Kunal Deshmukh - Academia.edu (original) (raw)

Papers by Kunal Deshmukh

Materials Science-Poland, 2020

Ho doped Ag2S thin films were grown on the glass substrate by chemical bath deposition (CBD) meth... more Ho doped Ag2S thin films were grown on the glass substrate by chemical bath deposition (CBD) method at room temperature. The bath contained aqueous solution of silver nitrate, thiourea, EDTA, ammonia and holmium nitrate. Silver nitrate was used as a silver (Ag+) ion source; thiourea as sulfur (S−) ion source, EDTA was a complexing agent while ammonia was used to maintain pH, Ho(NO3)3 was taken as a source of Ho ions. The optical absorption edge of undoped (pure) and Ho doped silver sulfide films was determined between 324 nm and 298 nm showing blue shift as compared to bulk Ag2S. Band gaps calculated from Tauc plot also showed an increase in values for doped samples. The increase in band gap indicates reduced particle size in the prepared Ho doped films. The photoluminescence emission peaks were observed at around 578 nm to 601 nm wavelength and excitation peaks were found at 351 nm to 294 nm for undoped and doped films. The SEM micrograph consists of globular ball type and flower t...

&lt;div&gt; &lt;p&gt;Keck Time-resolved Spectrophotometry of Temp... more &lt;div&gt; &lt;p&gt;Keck Time-resolved Spectrophotometry of Temporarily-Captured Minimoon 2020 CD&lt;sub&gt;3&lt;/sub&gt;&lt;/p&gt; &lt;p&gt;&lt;strong&gt;Bryce T. Bolin (1,2), &lt;/strong&gt;&lt;strong&gt;Christoffer Fremling (1), Timothy R. Holt (3,4), Matthew J. Hankins (1), Shreya Anand (1), Kishalay De (1), Kunal Deshmukh (5), Mansi M. Kasliwal (1), Alessandro Morbidelli (6), Josiah Purdum(7), Robert Quimby (7,8)&lt;/strong&gt;&lt;/p&gt; &lt;p&gt;(1) Division of Physics, Mathematics and Astronomy, Caltech, Pasadena, CA 91125, USA (bbolin@caltech.edu)&lt;/p&gt; &lt;p&gt;(2) IPAC, Mail Code 100-22, Caltech, 1200 E. California Blvd., Pasadena, CA 91125, USA&lt;/p&gt; &lt;p&gt;(3) Centre for Astrophysics, University of Southern Queensland, Queensland, Australia&lt;/p&gt; &lt;p&gt;(4) Southwest Research Institute, Department of Space Studies, Boulder, CO. USA.&lt;/p&gt; &lt;p&gt;(5) Dept. of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India&lt;/p&gt; &lt;p&gt;(6) Universit&amp;#233; C&amp;#244;te d&amp;#8217;Azur, Observatoire de la C&amp;#244;te d&amp;#8217;Azur, CNRS, Laboratoire Lagrange, Boulevard de l&amp;#8217;Observatoire, CS 34229, F-06304 Nice cedex 4, France&lt;/p&gt; &lt;p&gt;(7) Dept. of Astronomy, San Diego State University, 5500 Campanile Dr, San Diego, CA 92182, U.S.A.&lt;/p&gt; &lt;p&gt;(8) Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo Institutes for Advanced Study, The University of Tokyo, Kashiwa, Chiba 277-8583, Japan&lt;/p&gt; &lt;p&gt;We report on rotationally-averaged visible spectrophotometry of minimoon 2020 CD&lt;sub&gt;3&lt;/sub&gt;, the second known asteroid to be temporarily gravitationally captured by the Earth-Moon system, taken with Keck I/LRIS&amp;#160; between 434 nm and 912 nm in B, g, V, R, I and RG850 bands as it was leaving the Earth-Moon system on 2020 March 23 UTC. We find that the broad-band spectrum of 2020 CD&lt;sub&gt;3&lt;/sub&gt; most closely resembles a V-type asteroid and some lunar rock samples with a reddish surface with a slope of 18 +/- 3 % between 434 nm and 761 nm corresponding to colors of g-r = 0.62 +/-0.08, r-i = 0.21 +/- 0.06 and an absorption band at ~900 nm corresponding to i-z = -0.54 +/- 0.10 (Isaacson et al. 2011, DeMeo &amp; Carry 2013) as seen in the left panel of Fig. 1. Assuming typical albedos of V-type asteroids, we constrain 2020 CD&lt;sub&gt;3&lt;/sub&gt;'s size to be ~1.0 +/- 0.1 m in diameter when combined with our measured H magnitude of 31.74 +/- 0.14.&amp;#160; In our time-series data, we detect periodic lightcurve variations corresponding to a rotation period of ~573 s and a Lomb-Scargle false alarm probability of &lt;10&lt;sup&gt;-4 &lt;/sup&gt;(Fig. 2, left panel) with a lightcurve amplitude of ~1 magnitude implying a b/a axial ratio of ~2.5 (Fig. 2, right panel), though this is atypical for meter-scale asteroids which are thought to have rotation periods ~60 s (Bolin et al. 2014). In addition, we refine the orbit of 2020 CD&lt;sub&gt;3&lt;/sub&gt; with our observations extending the observational arc to 37 days between 2020 February 15 and 2020 March 23 constraining its duration of capture of 2020 CD&lt;sub&gt;3&lt;/sub&gt; to be ~1.2 years a typical capture lifetime for minimoons (Granvik et al. 2012) as seen in the right panel of Fig. 1. We also constrain the effect of radiation pressure on its orbit with an estimated area-to-mass ratio of 6.9 +/- 2.1 10&lt;sup&gt;-4&lt;/sup&gt; m&lt;sup&gt;2&lt;/sup&gt;/kg&lt;sup&gt;*&lt;/sup&gt;. Using our diameter and area-to-mass ratio estimates, we calculate a density of 1.6-3.3 g/cm&lt;sup&gt;3&lt;/sup&gt;, broadly compatible with the densities of other small asteroids with densities constrained by radiation pressure measurements (Micheli et al. 2012) and lunar rock (~2.4 g/cm&lt;sup&gt;3&lt;/sup&gt;, Kiefer et al. 2012) somewhat less dense than the typical ~3.5g/cm&lt;sup&gt;3&lt;/sup&gt; density of V-type asteroids (Carry 2012). We searched for pre-discovery observations of 2020 CD&lt;sub&gt;3&lt;/sub&gt; in the ZTF archive (Masci et al. 2019) but were unable to locate any positive detections.&lt;/p&gt; &lt;/div&gt; &lt;p&gt;&lt;strong&gt;References: &amp;#160;&lt;/strong&gt;Bolin et al. 2014, Icarus, 241, 280-297, Carry 2012, PSS, 73, 98-118, DeMeo &amp; Carry 2013, Icarus, 226, 723-741, Kiefer et al. 2012, GRL, 39, 7, Isaacson et al. 2011, M&amp;PS,…

Advances in Visual Computing, 2019

We present a neural network architecture inspired by the end-to-end compression framework [1]. Ou... more We present a neural network architecture inspired by the end-to-end compression framework [1]. Our model consists of an image compression module, an arithmetic encoder, an arithmetic decoder, and an image reconstruction module. We evaluate the compression rate and the closeness of the reconstructed image to the original image for this model. Structural similarity metrics and peak signal to noise ratio are used to evaluate the image quality. We have also measured the net reduction in file size after compression and compared it with other lossy image compression techniques. Our architecture achieves better results in terms of these metrics compared to traditional and newly proposed image compression algorithms. In particular, an average PSNR of 28.48 and SSIM value of 0.86 are obtained as compared to 28.45 PSNR and 0.81 SSIM value in the previously mentioned network.

2021 International Conference on Technological Advancements and Innovations (ICTAI), 2021

Intelligent Sustainable Systems, 2021

Algorithmic Trading is becoming ever increasing field. We implemented various machine learning me... more Algorithmic Trading is becoming ever increasing field. We implemented various machine learning methods to predict stock price direction in the following paper. Technical Indicators are taken as features and models are trained upon them. Stock price direction forecasting helps us to choose from daily trading techniques and increases the probability of having massive profits while maintaining low-risk profile. In our research extreme gradient boosting (XGBoost) technique has given the highest accuracy, i.e. 73.1% and have outperformed other machine learning techniques used. Our Proposed model outperforms existing models in literature and adds forecasting on day-by-day basis.

International Journal of Multidisciplinary Research and Development, 2015

Embedded zero-tree wavelet (EZW) coding, proposed by J. M. Shapiro, is a very computationally sim... more Embedded zero-tree wavelet (EZW) coding, proposed by J. M. Shapiro, is a very computationally simple and effective technique for image compression. Now we express an alternative description of the principles, so that the purpose for its better performance can be well understood. These principles are ordered bit plane transmission, an image wavelet transform self-similarity across different scales and a set partitioning sorting algorithm as a partial ordering by magnitude. Also we present an optional and efficient implementation based on set partitioning in hierarchical trees (SPIHT), image compression algorithm which is very effective, less complexity and generates an embedded compressed bit-stream that can be effectively decoded at several data rates. The results of image coding, obtained from reconstructed images by the decoding algorithm and actual file sizes, are comparable to or surpass previous results obtained through much more computationally complex and sophisticated method...

Image compression is one of the most studied problem in computer science. Lossy image compression... more Image compression is one of the most studied problem in computer science. Lossy image compression is being used to compress image size for transmission of images over the internet as well as their efficient storage. Convolutional Neural Networks have been used successfully in computer vision and image processing tasks but it is seldom used in tasks such as image compression. In this project, we will explore how image compression can be achieved using Deep Neural Networks which provides equivalent or better performance than traditional Image Encoding and data compression algorithms. We will show how Convolutional Neural Networks can be used along with Generative Adversarial Networks to improve image quality.

Materials Chemistry and Physics, 2019

Este estudo investigou três práticas psicoeducativas elaboradas e utilizadas em pesquisas interve... more Este estudo investigou três práticas psicoeducativas elaboradas e utilizadas em pesquisas interventivas realizadas em uma mesma comunidade pelo Grupo de Pesquisa em Práticas Educativas e Atenção Psicoeducacional à Família, Escola e Comunidade (Ecofam), do Programa de Pós-Graduação em Psicologia da Educação da PUC-SP. Realizaram-se leituras dos relatos dos procedimentos utilizados durante o período de 2004 a 2006, buscando compreender como as práticas se apresentavam e quais as consequências da sua aplicação para os que dela participaram, tendo como pano de fundo a interrogação a respeito da possibilidade de convocação para a ação à luz do pensamento de Hannah Arendt. A análise dos relatos e as reflexões trazidas por Hannah Arendt sugerem a necessidade de uma relativização do pensamento concernente ao fim último das intervenções realizadas na comunidade, qual seja a ação, compreendida, segundo Arendt, como a iniciação de um novo movimento. Palavras-chave: ação; reflexão; pesquisa interventiva.

The Astrophysical Journal, 2020

Bolin et al.