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Search Results: 1 - 10 of 1225 matches for " Arvind Viswanathan "
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Embedding a Noise Gate Pedal in an Instrument to Avoid Unwanted Noises
Arvind Viswanathan
Journal of Artificial Intelligence , 2012,
Abstract: In music there are many types of modifications that are done on the sounds such as filters, overdrive, dynamics, volume, pitch and ambience. The noise gate is one such effect which falls under the category of dynamics. Noise gate is something which helps in cutting of unwanted sounds be it below a certain level or be it at a particular decibel level. The level from which it can be cut off or from which it should be cut off is called the threshold level. There are three main functions that are present in a noise gate-threshold, attack, decay. The attack and the decay levels can be pre programmed or controlled by different equipment. Let us say that the attack levels are the same as what it is programmed in the other stomp boxes, effects or amplifiers or all three put together. The value of attack does not affect the noise gate. Our primary concern is to attenuate the unwanted sounds that are being generated.
Heterogeneous Dynamic Priority Scheduling in time critical applications: Mobile Wireless Sensor Networks
Arvind Viswanathan,Dr. Garimella Rama Murthy
Computer Science , 2013,
Abstract: In the unlicensed band, the notion of primary user and secondary user (To implement cognitive radio) is not explicit. By dynamic priority assignment we propose to implement cognitive radio in the unlicensed band. In time critical events, the data which is most important, has to be given the time slots. Wireless Sensor nodes in our case are considered to be mobile, and hence make it difficult to prioritize one over another. A node may be out of the reach of the cluster head or base station by the time it is allotted a time slot and hence mobility is a constraint. With the data changing dynamically and factors such as energy and mobility, which are major constraints, assigning priority to the nodes becomes difficult. In this paper, we have discussed about how Wireless Sensor Networks are able to allocate priorities to nodes in the unlicensed band with multiple parameters being posed. We have done simulations on NS-2 and have shown the implementation results.
A Learning Framework for Self-Tuning Histograms
Raajay Viswanathan,Prateek Jain,Srivatsan Laxman,Arvind Arasu
Computer Science , 2011,
Abstract: In this paper, we consider the problem of estimating self-tuning histograms using query workloads. To this end, we propose a general learning theoretic formulation. Specifically, we use query feedback from a workload as training data to estimate a histogram with a small memory footprint that minimizes the expected error on future queries. Our formulation provides a framework in which different approaches can be studied and developed. We first study the simple class of equi-width histograms and present a learning algorithm, EquiHist, that is competitive in many settings. We also provide formal guarantees for equi-width histograms that highlight scenarios in which equi-width histograms can be expected to succeed or fail. We then go beyond equi-width histograms and present a novel learning algorithm, SpHist, for estimating general histograms. Here we use Haar wavelets to reduce the problem of learning histograms to that of learning a sparse vector. Both algorithms have multiple advantages over existing methods: 1) simple and scalable extensions to multi-dimensional data, 2) scalability with number of histogram buckets and size of query feedback, 3) natural extensions to incorporate new feedback and handle database updates. We demonstrate these advantages over the current state-of-the-art, ISOMER, through detailed experiments on real and synthetic data. In particular, we show that SpHist obtains up to 50% less error than ISOMER on real-world multi-dimensional datasets.
U(2) invariant squeezing properties of pair coherent states
Physics , 2002, DOI: 10.1016/S0375-9601(02)00663-1
Abstract: The U(2) invariant approach is delineated for the pair coherent states to explore their squeezing properties. This approach is useful for a complete analysis of the squeezing properties of these two-mode states. We use the maximally compact subgroup U(2) of Sp(4,R) to mix the modes, thus allowing us to search over all possible quadratures for squeezing. The variance matrix for the pair coherent states turns out to be analytically diagonalisable, giving us a handle over its least eigenvalue, through which we are able to pin down the squeezing properties of these states. In order to explicitly demonstrate the role played by U(2) transformations, we connect our results to the previous analysis of squeezing for the pair coherent states.
Quantum Entanglement and Quantum Computational Algorithms
Physics , 2000, DOI: 10.1007/s12043-001-0130-9
Abstract: The existence of entangled quantum states gives extra power to quantum computers over their classical counterparts. Quantum entanglement shows up qualitatively at the level of two qubits. We show that if no entanglement is envolved then whatever one can do with qubits can also be done with classical optical systems. We demonstrate that the one- and the two-bit Deutsch-Jozsa algorithm does not require entanglement and can be mapped onto a classical optical scheme. It is only for three and more input bits that the DJ algorithm requires the implementation of entangling transformations and in these cases it is impossible to implement this algorithm classically.
Structure, Composition and Diversity of Horticulture Trees and Agricultural Crops Productivity under Traditional Agri-Horticulture System in Mid Hill Situation of Garhwal Himalaya, India  [PDF]
Arvind Bijalwan
American Journal of Plant Sciences (AJPS) , 2012, DOI: 10.4236/ajps.2012.34057
Abstract: Productivity of agricultural crops under traditional agri-hortculture system alongwith structure, composition and diversity of fruit trees and shrub species in mid hill situation of Garhwal Himalaya, India between 1000 to 2000 m asl during summer and winter seasons on northern and southern aspect were studied. The tree density, composition and diversity in the system varied depending upon aspect, landholding and requirements of the farmers. A total of 12 fruit tree species were recorded in agri-horticulture system; of which 4 trees were common in northern and southern aspect and 6 trees were only noticed in northern aspect while 2 in the southern. The apple tree (Malus domestica) was recorded to be dominant fruit tree species with highest IVI values on both northern and southern aspect with prime preference by the farmers for high additional economic return in agri-horticulture system. Among the shrubs, the 6 shrub species were recorded on the northern aspect whereas there number was 16 on southern aspect. The agricultural crop diversity was higher on the northern aspect in summer and winter season. The average annual productivity of grain under agri-horticulture system recorded 1106 kg·ha–1·year–1 on northern aspect and 1122 kg·ha–1·year–1 on southern with a reduction of 34.56% and 38.29% compared to the sole agriculture crops. The aspect and season also played significantly role in grain, straw and biological productivity of agricultural crops present in agri-horticulture and sole cropping systems. In general there was reduction in yield of agricultural crops under fruit trees but this reduction is supplemented by fruit production which support and sustain the rural community of this hilly region.
Financial Inclusion: Opportunities, Issues and Challenges  [PDF]
George Varghese, Lakshmi Viswanathan
Theoretical Economics Letters (TEL) , 2018, DOI: 10.4236/tel.2018.811126
Abstract: An all-inclusive financial system is essential for a nation as it augments efficiency and welfare by providing scope for secure and safe saving practices and by facilitating a wide range of improved financial services. The focus of the present study is on identifying the opportunities, issues, and challenges of financial inclusion in India.
Procesos puntuales, densidades producto y biología celular
Revista Colombiana de Estadística , 2005,
Abstract: in this paper an attempt is made to explain how point processes have been successfully used in modeling cell biology problems. in particular we demonstrate the utility of the product density techniques in dealing with cells sub- ject to radiation. in this paper, we propose two types of stochastic models: the first one is concerned with cell repair based on enzyme kinetics and the second one with parity of cells in tumor growth. using product density techniques, we device several key statistical characteristics of the models.
Arunachalam Viswanathan
Revista Colombiana de Estadística , 2005,
Abstract: In this paper an attempt is made to explain how point processes have been successfully used in modeling cell biology problems. In particular we demonstrate the utility of the product density techniques in dealing with cells subject to radiation. In this paper, we propose two types of stochastic models: the first one is concerned with cell repair based on enzyme kinetics and the second one with parity of cells in tumor growth. Using product density techniques, we device several key statistical characteristics of the models. En este artículo se explica cómo los procesos puntuales han sido usados con éxito para modelar problemas de poblaciones celulares. En particular, se muestra la utilidad de la técnica de densidades producto para tratar un problema de células sujetas a radiación. Se proponen dos tipos de modelos estocásticos: el primero trata sobre la reparación de células basada en cinética enzimática y el segundo sobre la paridad de células en el crecimiento de un tumor. Mediante la técnica de densidades producto hallamos varias características estadísticas claves de estos dos modelos.
Polyphony of midnight’s children: dispersion of voices and genres in Midnight’s Children = Polifonia dos filhos de meia-noite: dispers o de vozes e gêneros em Midnight’s Children
Uma Viswanathan
Acta Scientiarum : Language and Culture , 2010,
Abstract: This paper explores the aspect of polyphony in Salman Rushdie’s novelMidnight’s Children (1981). The essence of polyphony in a novel, following Mikhail Bakhtin, is the presence or use of different independent voices that are not merged into one dominant voice. The author, the protagonist, the narrator, the various other characters, the reader, the form and the content of the text, and even the voices from the world outside the text, all these participate in the polyphony. We are invited to explore multiple, co-existing meanings rather than to find a single, finalized meaning. In our age of rapid changes in concepts, styles, modes of representation, and technology, it is more profitable to direct our attention to multiple realities rather than to look for one definitive, unchanging meaning. Since the entities engaged in the polyphony take on different roles and voices in different contexts of time, space, and culture, the voices we hear in the polyphony multiply. We come to see that reality can have different meanings. Reading a novel such as Midnight’s Children as a polyphony or dialogue among different voices can serve as an analogy for a mode that we can adopt in our attempts to understand reality. Este ensaio analisa a polifonia no romance Midnight’s Children (1981),de Salman Rushdie. De acordo como Mikhail Bakhtin, a essência da polifonia é a presen a ou o uso de vozes diferentes e independentes que n o se misturam numa única voz dominante. O autor, o protagonista, o narrador, os vários personagens, o leitor, a forma e ocontexto do texto e até as vozes de fora do texto participam nesta polifonia. Exploram-se, portanto, os sentidos múltiplos e coexistentes; recha a-se a procura de um significado unívoco e definitivo. Numa época de grandes mudan as em conceitos, estilos, modos de representa o e tecnologia, seria muito melhor direcionar nossa aten o às múltiplas realidades do que procurar um sentido imutável. Já que os personagens na polifonia assumem papéis e vozes diferentes em diferentes contextos de tempo, espa o e cultura,multiplicam-se as vozes ouvidas na polifonia. A realidade assume vários sentidos e a leitura de Midnight’s Children como um romance polif nico ou como diálogo entre vozes diferentes servirá como analogia para uma modalidade que podemos adotar para entender a realidade.
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