1,203 research outputs found

    Political Economy of Renewable Energy Deployment in India: Case Study of Karnataka

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    Over the past few years, India has paid considerable attention to the development of its Renewable Energy (RE) capacity. This can be attributed to the country's energy security concerns, necessity to provide reliable electricity to its citizens and the global need to mitigate climate change. India's ambitious targets project that by 2020, 10 per cent of its power shall come from renewable sources and by 2022 there will be 165 GW of RE capacity installed. Of this target capacity, there will be a 100 GW of installed solar capacity, 60 MW from wind and 5 MW from other sources such as small hydro and bioenergy (Vashishtha 2014). This implies that within the next five years, India has to undertake the mammoth task of almost doubling its RE contribution to the energy mix from the current 6 per cent. The solar sector faces the largest challenge of scaling up its capacity by almost 20 times in six years, from the current 4.7 GW (MNRE 2016).Such tremendous growth can only be accomplished through an effective policy and regulatory framework, which is essential to incentivise the deployment of RE. Pegels and Lu?tkenhorst (2014) state that government intervention is particularly necessary for energy policy because market mechanisms such as falling prices alone are not sufficient to ensure the development of long-term sustainable infrastructure. They further say that as a nation's energy policy determines the future of the basic public services, it is important to have a holistic view from the political, socio-economic and technological aspects. In India however, RE policy interventions have not taken such a holistic approach. Current national policies such as preferential-grid access, Feed in Tariffs (FiT), Renewable Purchase Obligations (RPO) on utilities, tax holidays, RE Certificate (REC) trading and Accelerated Depreciation (AD) only address techno-economic barriers. While these are surely important incentives, in the past they haven't been sufficient for Indian states to meet their RE targets. Further, it appears unlikely that India will manage to meet its FY 16 targets in the next few months looking at the large gap between target and achievement (Figure 1). does India need to do to ensure that it's RE aspirations do not remain a pipedream? As Sreekumar and Chitnis (2014) point out, in order to have a complete idea of the electricity sector, in addition to techno-economic considerations, a political perspective is also imperative. Hence, this article attempts to answer the question posed above by providing insights into the political economy of the RE sector in India. Key observations from an extensive stakeholder consultation (n=20) conducted in the Indian state of Karnataka have been used in this study (CSTEP 2014).This case study revealed that despite high targets and two comprehensive RE policies (GoK 2014; GoK 2010) the deployment of RE technologies has faced significant barriers in Karnataka during the past five years. The state was unable to meet its targets for RE capacity installation in all renewable sources (biomass, wind, solar, small-hydro) that were laid down in the Karnataka 2009-2014 RE policy. Although the state did have an impressive 10 per cent of its electricity from RE sources in Financial Year (FY) '13, there was an unmet peak demand of 1.4 GW and electricity deficit of 14 per cent (CSTEP 2013)

    Linear Precoders for Non-Regenerative Asymmetric Two-way Relaying in Cellular Systems

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    Two-way relaying (TWR) reduces the spectral-efficiency loss caused in conventional half-duplex relaying. TWR is possible when two nodes exchange data simultaneously through a relay. In cellular systems, data exchange between base station (BS) and users is usually not simultaneous e.g., a user (TUE) has uplink data to transmit during multiple access (MAC) phase, but does not have downlink data to receive during broadcast (BC) phase. This non-simultaneous data exchange will reduce TWR to spectrally-inefficient conventional half-duplex relaying. With infrastructure relays, where multiple users communicate through a relay, a new transmission protocol is proposed to recover the spectral loss. The BC phase following the MAC phase of TUE is now used by the relay to transmit downlink data to another user (RUE). RUE will not be able to cancel the back-propagating interference. A structured precoder is designed at the multi-antenna relay to cancel this interference. With multiple-input multiple-output (MIMO) nodes, the proposed precoder also triangulates the compound MAC and BC phase MIMO channels. The channel triangulation reduces the weighted sum-rate optimization to power allocation problem, which is then cast as a geometric program. Simulation results illustrate the effectiveness of the proposed protocol over conventional solutions.Comment: 30 pages, 7 figures, submitted to IEEE Transactions on Wireless Communication

    A method of cleaning microscope slides for their repeated use in the examination of sputum for tubercle bacilli

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    The difficulty with which acid-fast bacilli are removed from glass slides has led several workers to recommend that only new slides should be used for the preparation of smears to demonstrate the presence of tubercle bacilli (Wilson and Miles, 1955; Baker, Silverton and Luckock, 1957; Cruickshank, 1960). This practice cannot easily be followed in many countries where microscope slides of good quality are expensive and often difficult to obtain. The experiment reported here was under-taken to determine whether a modern method of cleaning, incorporating the use of a detergent, can remove the tubercle bacilli from glass slides on which they have been heat-fixed and stained

    Prediction of Overpressure from Finite Volume Explosions

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    Tri-nitro toluene (TNT) equivalence is not a good criterion for evaluating the practically encounted nonideal blast waves during ignition and in explosion-safety problems. A theoretical model which shows the trends related to the effects of source volume and energy time release on blast wave strength is discussed. A slower energy release and a larger source volume are shown to be necessary to reduce the blast effects

    Early analysis of VLSI systems with packaging considerations

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    There is an explosive growth in the size of the VLSI (Very Large Scale Integration) systems today. Microelectronic system designers are packing millions of transistors in a single IC chip. Packaging techniques like Multi-chip module (MCM) and flip-chip bonding offer faster interconnects and IC\u27s capable of accommodating a larger number of inputs and outputs. The complexity of today\u27s designs and the availability of advanced packaging techniques call for an early analysis of the system based on estimation of system parameters to select from a wide choice of circuit partitioning, architecture alternatives and packaging options which give the best cost/performance. A procedure for the early analysis of VLSI systems under packaging considerations has been developed and implemented in this dissertation work. The early analysis tool was used to evaluate the inter-relationship between partitioning and packaging and to determine the best system design considering cost, size and delays. The functional unit level description of a 750,000-transistor MicroSparc processor was studied using an exhaustive search technique. The early analysis performed on the MicroSparc design suggested that the three chip multi-chip design using flip-chip IC\u27s interconnected on a MCM-D substrate is the most cost effective. An early bond pitch analysis performed using the tool concluded that a 250-micron bond pitch is the best choice for the multi-chip MicroSparc designs. The tool was also used to perform an early cache analysis which showed that the use of separate memory and logic processes made it feasible to design the MicroSparc design with larger cache sizes than the use of a combined logic and memory process. The designs based on the separate processes gave equivalent or better performance than the design candidates with smaller cache sizes. Future extensions of the procedure are also outlined here

    Analysis of production control methods for semiconductor research and development fabs using simulation

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    The importance of semiconductor device fabrication has been rising steadily over many years. Integrated circuit technology and innovation depends on successful research and development (R&D). R&D establishes the direction for prevailing technology in electronics and computers. To be a leader in the semiconductor industry, a company must bring technology to the market as soon as its application is deemed feasible. Using suitable production control methods for wafer fabrication in R&D fabs ensures reduction in cycle times and planned inventories, which in turn help to more quickly, transfer the new technology to the production fabs, where products are made on a commercial scale. This helps to minimize the time to market. The complex behavior of research fabs produces varying results when conventional production control methodologies are applied. Simulation modeling allows the study of the behavior of the research fab by providing statistical reports on performance measures. The goal of this research is to investigate production control methods in semiconductor R&D fabs. A representative R&D fab is modeled, where an appropriate production load is applied to the fab by using a representative product load. Simulation models are run with different levels of production volume, lot priorities, primary and secondary dispatching strategies and due date tightness as treatment combinations in a formally designed experiment. Fab performance is evaluated based on four performance measures, which include percent on time delivery, average cycle time, standard deviation of cycle time and average work-in-process. Statistical analyses are used to determine the best performing dispatching rules for given fab operating scenarios. Results indicate that the optimal combination of dispatching rules is dependent on specific fab characteristics. However, several dispatching rules are found to be robust across performance measures. A simulation study of the Semiconductor & Microsystems Fabrication Laboratory (SMFL) at the Rochester Institute of Technology (RIT) is used to verify the results

    Linear and Nonlinear Optical Properties of Mn doped Benzimidazole Thin Films

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    In the present work, the Mn doped benzimidazole (BMZ) thin films were prepared by simple chemical bath deposition technique. The material was directly deposited as thin film on glass substrates and the metal concentration in the solution was varied in weight percentage in order to investigate the dopant effect on the properties of thin films. Similarly, the Mn doped BMZ films were deposited in different solution temperature to study the effect of deposition temperature on the properties of thin films. The PXRD and FT-IR spectroscopy are used to study the structural and the presence of functional groups in the BMZ medium. Depending upon the solution temperature, thickness of the films varying from 0.6 to 1.2 {\mu}m and the optical transparency of the samples increases with the increasing temperature up to 50 {\deg}C. Second Harmonic Generation (SHG) efficiency of the films is measured for all the films. Third order nonlinear optical properties of the films were analyzed using Z-scan technique. The experimental results show that Mn doped BMZ films exhibits saturation absorption and negative nonlinearity.Comment: This has been presented in DAE 58th Solid State Symposium held at Thapar University, Patiala, Punjab, India. Will be published in AIP conference proceedings soo

    A Topological Distance between Multi-fields based on Multi-Dimensional Persistence Diagrams

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    The problem of computing topological distance between two scalar fields based on Reeb graphs or contour trees has been studied and applied successfully to various problems in topological shape matching, data analysis, and visualization. However, generalizing such results for computing distance measures between two multi-fields based on their Reeb spaces is still in its infancy. Towards this, in the current paper we propose a technique to compute an effective distance measure between two multi-fields by computing a novel \emph{multi-dimensional persistence diagram} (MDPD) corresponding to each of the (quantized) Reeb spaces. First, we construct a multi-dimensional Reeb graph (MDRG), which is a hierarchical decomposition of the Reeb space into a collection of Reeb graphs. The MDPD corresponding to each MDRG is then computed based on the persistence diagrams of the component Reeb graphs of the MDRG. Our distance measure extends the Wasserstein distance between two persistence diagrams of Reeb graphs to MDPDs of MDRGs. We prove that the proposed measure is a pseudo-metric and satisfies a stability property. Effectiveness of the proposed distance measure has been demonstrated in (i) shape retrieval contest data - SHREC 20102010 and (ii) Pt-CO bond detection data from computational chemistry. Experimental results show that the proposed distance measure based on the Reeb spaces has more discriminating power in clustering the shapes and detecting the formation of a stable Pt-CO bond as compared to the similar measures between Reeb graphs.Comment: Acepted in the IEEE Transactions on Visualization and Computer Graphic
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