597 results on '"Pandey, Rakesh"'
Search Results
2. Report of Fall Army Worm Spodoptera frugiperda from Bundelkhand Region of Uttar Pradesh
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Pandey, Rakesh, Singh, A K, Mishra, M K, Singh, B K, and Singh, S K
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- 2023
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3. The infrastructure powering IBM's Gen AI model development
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Gershon, Talia, Seelam, Seetharami, Belgodere, Brian, Bonilla, Milton, Hoang, Lan, Barnett, Danny, Chung, I-Hsin, Mohan, Apoorve, Chen, Ming-Hung, Luo, Lixiang, Walkup, Robert, Evangelinos, Constantinos, Salaria, Shweta, Dombrowa, Marc, Park, Yoonho, Kayi, Apo, Schour, Liran, Alim, Alim, Sydney, Ali, Maniotis, Pavlos, Schares, Laurent, Metzler, Bernard, Karacali-Akyamac, Bengi, Wen, Sophia, Chiba, Tatsuhiro, Choochotkaew, Sunyanan, Yoshimura, Takeshi, Misale, Claudia, Elengikal, Tonia, Connor, Kevin O, Liu, Zhuoran, Molina, Richard, Schneidenbach, Lars, Caden, James, Laibinis, Christopher, Fonseca, Carlos, Tarasov, Vasily, Sundararaman, Swaminathan, Schmuck, Frank, Guthridge, Scott, Cohn, Jeremy, Eshel, Marc, Muench, Paul, Liu, Runyu, Pointer, William, Wyskida, Drew, Krull, Bob, Rose, Ray, Wolfe, Brent, Cornejo, William, Walter, John, Malone, Colm, Perucci, Clifford, Franco, Frank, Hinds, Nigel, Calio, Bob, Druyan, Pavel, Kilduff, Robert, Kienle, John, McStay, Connor, Figueroa, Andrew, Connolly, Matthew, Fost, Edie, Roma, Gina, Fonseca, Jake, Levy, Ido, Payne, Michele, Schenkel, Ryan, Malki, Amir, Schneider, Lion, Narkhede, Aniruddha, Moshref, Shekeba, Kisin, Alexandra, Dodin, Olga, Rippon, Bill, Wrieth, Henry, Ganci, John, Colino, Johnny, Habeger-Rose, Donna, Pandey, Rakesh, Gidh, Aditya, Gaur, Aditya, Patterson, Dennis, Salmani, Samsuddin, Varma, Rambilas, Rumana, Rumana, Sharma, Shubham, Mishra, Mayank, Panda, Rameswar, Prasad, Aditya, Stallone, Matt, Zhang, Gaoyuan, Shen, Yikang, Cox, David, Puri, Ruchir, Agrawal, Dakshi, Thorstensen, Drew, Belog, Joel, Tang, Brent, Gupta, Saurabh Kumar, Biswas, Amitabha, Maheshwari, Anup, Gampel, Eran, Van Patten, Jason, Runion, Matthew, Kaki, Sai, Bogin, Yigal, Reitz, Brian, Pritko, Steve, Najam, Shahan, Nambala, Surya, Chirra, Radhika, Welp, Rick, DiMitri, Frank, Telles, Felipe, Arvelo, Amilcar, Chu, King, Seminaro, Ed, Schram, Andrew, Eickhoff, Felix, Hanson, William, Mckeever, Eric, Joseph, Dinakaran, Chaudhary, Piyush, Shivam, Piyush, Chaudhary, Puneet, Jones, Wesley, Guthrie, Robert, Bostic, Chris, Islam, Rezaul, Duersch, Steve, Sawdon, Wayne, Lewars, John, Klos, Matthew, Spriggs, Michael, McMillan, Bill, Gao, George, Kamra, Ashish, Singh, Gaurav, Curry, Marc, Katarki, Tushar, Talerico, Joe, Shi, Zenghui, Malleni, Sai Sindhur, and Gallen, Erwan
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Computer Science - Distributed, Parallel, and Cluster Computing ,Computer Science - Artificial Intelligence - Abstract
AI Infrastructure plays a key role in the speed and cost-competitiveness of developing and deploying advanced AI models. The current demand for powerful AI infrastructure for model training is driven by the emergence of generative AI and foundational models, where on occasion thousands of GPUs must cooperate on a single training job for the model to be trained in a reasonable time. Delivering efficient and high-performing AI training requires an end-to-end solution that combines hardware, software and holistic telemetry to cater for multiple types of AI workloads. In this report, we describe IBM's hybrid cloud infrastructure that powers our generative AI model development. This infrastructure includes (1) Vela: an AI-optimized supercomputing capability directly integrated into the IBM Cloud, delivering scalable, dynamic, multi-tenant and geographically distributed infrastructure for large-scale model training and other AI workflow steps and (2) Blue Vela: a large-scale, purpose-built, on-premises hosting environment that is optimized to support our largest and most ambitious AI model training tasks. Vela provides IBM with the dual benefit of high performance for internal use along with the flexibility to adapt to an evolving commercial landscape. Blue Vela provides us with the benefits of rapid development of our largest and most ambitious models, as well as future-proofing against the evolving model landscape in the industry. Taken together, they provide IBM with the ability to rapidly innovate in the development of both AI models and commercial offerings., Comment: Corresponding Authors: Talia Gershon, Seetharami Seelam,Brian Belgodere, Milton Bonilla
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- 2024
4. Initial results of our spectro-photometric monitoring of XZ Tau
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Ghosh, Arpan, Sharma, Saurabh, Ninan, Joe Philip, Ojha, Devendra K., Verma, Aayushi, Sahu, Tarak Chand, Pandey, Rakesh, and Singh, Koshvendra
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Astrophysics - Solar and Stellar Astrophysics - Abstract
We present here initial results of our spectro-photometric monitoring of XZ Tau. During our monitoring period, XZ Tau exhibited several episodes of brightness variations in timescales of months at optical wavelengths in contrast to the mid-infrared wavelengths. The color evolution of XZ Tau during this period suggest that the brightness variations are driven by changes in accretion from the disc. The mid-infrared light curve shows an overall decline in brightness by $\sim$ 0.5 and 0.7 magnitude respectively in WISE W1 (3.4 $\mu$m) and W2 (4.6 $\mu$m) bands. The emission profile of the hydrogen recombination lines along with that of Ca II IRT lines points towards magnetospheric accretion of XZ Tau. We have detected P Cygni profile in H$\beta$ indicating of outflowing winds from regions close to accretion. Forbidden transitions of oxygen are also detected, likely indicating of jets originating around the central pre-main sequence star., Comment: 11 pages, 3 figures, Accepted for publication in The Bulletin de la Soci\'et\'e Royale des Sciences de Li\`ege
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- 2024
5. Studies into the Synergy Between MoS2-rGO-gC3N4 for Photocatalytic and Supercapacitor Applications
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Neha, Andola, Anshu, Pandey, Ravi R., Pandey, Rakesh K., Rambabu, P., Das, Pradip, Rabani, Iqra, and Turpu, G. R.
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- 2024
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6. Deciphering the Hidden Structures of HH 216 and Pillar IV in M16: Results from JWST and HST
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Dewangan, L. K., Jadhav, O. R., Maity, A. K., Bhadari, N. K., Sharma, Saurabh, Padovani, M., Baug, T., Mayya, Y. D., and Pandey, Rakesh
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Astrophysics - Astrophysics of Galaxies - Abstract
To probe the star formation process, we present an observational investigation of the Pillar IV and an ionized knot HH 216 in the Eagle Nebula (M16). Pillar IV is known to host a Class I protostar that drives a bipolar outflow. The outflow has produced the bow shock, HH 216, which is associated with the red-shifted outflow lobe. The James Webb Space Telescope's near- and mid-infrared images (resolution $\sim$0.07 arcsec - 0.7 arcsec) reveal the protostar as a single, isolated object (below 1000 AU). The outer boundary of Pillar IV is depicted with the 3.3 $\mu$m Polycyclic aromatic hydrocarbon (PAH) emission. HH 216 is traced with the 4.05 $\mu$m Br$\alpha$ and the radio continuum emission, however it is undetected with 4.693 $\mu$m H$_{2}$ emission. HH 216 seems to be associated with both thermal and non-thermal radio emissions. High-resolution images reveal entangled ionized structures (below 3000 AU) of HH 216, which appear to be located toward termination shocks. New knots in 4.693 $\mu$m H$_{2}$ emission are detected, and are mainly found on Pillar IV's northern side. This particular result supports the previously proposed episodic accretion in the powering source of HH 216. One part of the ionized jet (extent $\sim$0.16 pc) is discovered on the southern side of the driving source. Using the $^{12}$CO($J$ = 1-0), $^{12}$CO($J$ = 3-2), and $^{13}$CO($J$ = 1-0) emission, observational signposts of Cloud-Cloud Collision (or interacting clouds) toward Pillar IV are investigated. Overall, our results suggest that the interaction of molecular cloud components around 23 and 26 km s$^{-1}$ might have influenced star formation activity in Pillar IV., Comment: 19 pages, 13 figures, 1 Tables, Accepted for publication in Monthly Notices of the Royal Astronomical Society (MNRAS) Journal
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- 2024
7. Identifying the population of T-Tauri stars in Taurus: UV-optical synergy
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Nayak, Prasanta K., Narang, Mayank, Puravankara, Manoj, Tyagi, Himanshu, Banerjee, Bihan, Sharma, Saurabh, Pandey, Rakesh, Surya, Arun, Mathew, Blesson, Arun, R., Ujjwal, K., and Kartha, Sreeja S.
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Astrophysics - Solar and Stellar Astrophysics ,Astrophysics - Astrophysics of Galaxies - Abstract
With the third data release of the Gaia mission $Gaia$ DR3 with its precise photometry and astrometry, it is now possible to study the behaviour of stars at a scale never seen before. In this paper, we developed new criteria to identify T-Tauri stars (TTS) candidates using UV and optical CMDs by combining the GALEX and Gaia surveys. We found 19 TTS candidates and 5 of them are newly identified TTS in the Taurus Molecular Cloud (TMC), not catalogued before as TMC members. For some of the TTS candidates, we also obtained optical spectra from several Indian telescopes. We also present the analysis of the distance and proper motion of young stars in the Taurus using data from $Gaia$ DR3. We found that the stars in Taurus show a bimodal distribution with distance, having peaks at $130.17_{-1.24}^{1.31}$ pc and $156.25_{-5.00}^{1.86}$ pc. The reason for this bimodality, we think, is due to the fact that different clouds in the TMC region are at different distances. We further show that the two populations have similar ages and proper motion distribution. Using the $Gaia$ DR3 colour-magnitude diagram, we show that the age of Taurus is consistent with 1 Myr., Comment: 13 pages, 10 figures
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- 2023
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8. Sharp Estimates on Coefficient functionals of Ozaki close-to-convex functions
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Kumar, Sushil, pandey, Rakesh Kumar, and Rai, Pratima
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Mathematics - Complex Variables - Abstract
The goal of this manuscript to establish the best possible estimate on coefficient functionals like Hermitian-Toeplitz determinant of secoend order involving logarithmic coefficients, initial logarithmic inverse coefficients and initial order Schwarzian derivatives of the Ozaki close-to-convex functions.
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- 2023
9. Dissecting the morphology of star forming complex S193
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Pandey, Rakesh, Sharma, Saurabh, Dewangan, Lokesh, Ojha, D. K., Ghosh, Neelam Panwar Arpan, Sinha, Tirthendu, Verma, Aayushi, and Kaur, Harmeen
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Astrophysics - Astrophysics of Galaxies ,Astrophysics - Solar and Stellar Astrophysics - Abstract
We have studied a star-forming complex S193 using near-infrared (NIR) observations and other archival data covering optical to radio wavelengths. We identified stellar clusters in the complex using the NIR photometric data and estimated the membership and distance of the clusters. Using the mid-infrared (MIR) and far-infrared (FIR) images, the distribution of the dust emission around H\,{\sc ii} regions is traced in the complex. The $Herschel$ column density and temperature maps analysis reveal 16 cold dust clumps in the complex. The H$\alpha$ image and 1.4 GHz radio continuum emission map are employed to study the ionised gas distribution and infer the spectral type and the dynamical age of each H\,{\sc ii} region/ionised clump in the complex. The $^{12}$CO(J =3$-$2) and $^{13}$CO(J =1$-$0) molecular line data hint at the presence of two velocity components around [-43,-46] and [-47,-50] km/s, and their spatial distribution reveals two overlapping zones toward the complex. By investigating the immediate surroundings of the central cluster [BDS2003]57 and the pressure calculations, we suggest that the feedback from the massive stars seems responsible for the observed velocity gradient and might have triggered the formation of the central cluster [BDS2003]57.}, Comment: Accepted for publication in MNRAS, 20 pages, 15 figures
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- 2023
10. Sharp bounds on Coefficient functionals of certain Sakaguchi functions
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Kumar, Sushil, Pandey, Rakesh Kumar, and Rai, Pratima
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Mathematics - Complex Variables ,30C45, 30C50 - Abstract
We determine sharp bounds on some Hankel determinants involving initial coefficients, inverse coefficients, and logarithmic inverse coefficients for two subclasses of Sakaguchi functions which are associated with the right half of the lemniscate of Bernoulli and the exponential function. Further, we compute sharp bounds on the second Hermitian-Toeplitz determinants involving logarithmic coefficients and logarithmic inverse coefficients. We also discuss invariant property for the obtained estimates with respect to various coefficients.
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- 2023
11. Exploring Stellar Cluster and Feedback-driven Star Formation in Galactic Mid-infrared Bubble [HKS2019] E70
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Verma, Aayushi, Sharma, Saurabh, Mallick, Kshitiz K., Dewangan, Lokesh, Ojha, Devendra K., Yadav, Ram Kesh, Pandey, Rakesh, Ghosh, Arpan, Kaur, Harmeen, Panwar, Neelam, and Chand, Tarak
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Astrophysics - Astrophysics of Galaxies - Abstract
We present a comprehensive analysis of the Galactic mid-infrared (MIR) bubble [HKS2019] E70 (E70) by adopting a multi-wavelength approach to understand the physical environment and star formation scenario around it. We identified a small (radius ~1.7 pc) stellar clustering inside the E70 bubble and its distance is estimated as 3.26 +/- 0.45 kpc. This cluster is embedded in the molecular cloud and hosts massive stars as well as young stellar objects (YSOs), suggesting active star formation in the region. The spectral type of the brightest star 'M1' of the E70 cluster is estimated as O9V and a circular ring/shell of gas and dust is found around it. The diffuse radio emission inside this ring/shell, the excess pressure exerted by the massive star 'M1' at the YSOs core, and the distribution of photo-dissociation regions (PDRs), a Class I YSO, and two ultra-compact (UC) H II regions on the rim of this ring/shell, clearly suggest positive feedback of the massive star 'M1' in the region. We also found a low-density shell-like structure in 12 CO(J=1-0) molecular emission along the perimeter of the E70 bubble. The velocity structure of the 12 CO emission suggests that the feedback from the massive star appears to have expelled the molecular material and subsequent swept-up material is what appears as the E70 bubble., Comment: 24 pages, 16 Figures, Accepted for publication in ApJ
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- 2023
12. Post-outburst evolution of bonafide FUor V2493 Cyg: A Spectro-photometric monitoring
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Ghosh, Arpan, Sharma, Saurabh, Ninan, Joe P., Ojha, Devendra K., Bhatt, Bhuwan C., Sahu, D. K., Baug, Tapas, Yadav, R. K., Irawati, Puji, Gour, A. S., Panwar, Neelam, Pandey, Rakesh, Sinha, Tirthendu, and Verma, Aayushi
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Astrophysics - Solar and Stellar Astrophysics - Abstract
We present here the results of eight years of our near-simultaneous optical/near-infrared spectro-photometric monitoring of bonafide FUor candidate `V2493 Cyg' starting from 2013 September to 2021 June. During our optical monitoring period (between October 16, 2015 and December 30, 2019), the V2493 Cyg is slowly dimming with an average dimming rate of $\sim$26.6 $\pm$ 5.6 mmag/yr in V band. Our optical photometric colors show a significant reddening of the source post the second outburst pointing towards a gradual expansion of the emitting region post the second outburst. The mid infra-red colors, on the contrary, exhibits a blueing trend which can be attributed to the brightening of the disc due to the outburst. Our spectroscopic monitoring shows a dramatic variation of the H$\alpha$ line as it transitioned from absorption feature to the emission feature and back. Such transition can possibly be explained by the variation in the wind structure in combination with accretion. Combining our time evolution spectra of the Ca II infra-red triplet lines with the previously published spectra of V2493 Cyg, we find that the accretion region has stabilised compared to the early days of the outburst. The evolution of the O I $\lambda$7773 \AA~ line also points towards the stabilization of the circumstellar disc post the second outburst., Comment: 34 pages, 12 figures, 6 tables, accepted for publication in ApJ
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- 2023
13. AFGL 5180 and AFGL 6366S: sites of hub-filament systems at the opposite edges of a filamentary cloud
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Maity, A. K., Dewangan, L. K., Bhadari, N. K., Ojha, D. K., Chen, Z., and Pandey, Rakesh
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Astrophysics - Astrophysics of Galaxies - Abstract
We present a multi-scale and multi-wavelength study to unveil massive star formation (MSF) processes around sites AFGL 5180, and AFGL 6366S, both hosting a Class II 6.7 GHz methanol maser emission. The radio continuum map at 8.46 GHz reveals a small cluster of radio sources toward AFGL 5180. Signatures of the early stages of MSF in our target sites are spatially seen at the opposite edges of a filamentary cloud (length $\sim$5 pc), which is observed in the sub-millimeter dust continuum maps. Using the near-infrared photometric data, the spatial distribution of young stellar objects is found toward the entire filament, primarily clustered at its edges. The getsf utility on the Herschel far-infrared images reveals a hub-filament system (HFS) toward each target site. The analysis of the molecular line data, which benefits from large area coverage ($\sim$1 degree $\times$ 1 degree), detects two cloud components with a connection in both position and velocity space. This supports the scenario of a cloud-cloud collision (CCC) that occurred $\sim$1 Myr ago. The filamentary cloud, connecting AFGL 5180 and AFGL 6366S, seems spatially close to an HII region Sh2-247 excited by a massive O9.5 star. Based on the knowledge of various pressures exerted by the massive star on its surroundings, the impact of its energetic feedback on the filamentary cloud is found to be insignificant. Overall, our observational outcomes favor the possibility of the CCC scenario driving MSF and the formation of HFSs toward the target sites., Comment: Accepted for publication in MNRAS; 20 pages, 11 figures, and 1 table
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- 2023
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14. Investigating star formation activity in the Sh 2-61 H II region
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Pandey, Rakesh, Sharma, Saurabh, Dewangan, Lokesh, Verma, Aayushi, Baug, Tapas, Kaur, Harmeen, and Ghosh, Arpan
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Astrophysics - Astrophysics of Galaxies ,Astrophysics - Solar and Stellar Astrophysics - Abstract
Using the multiwavelength data sets, we studied the star formation activity in H II region Sh 2-61 (hereafter S61). We identified a clustering in the region and estimated the membership using the Gaia proper motion data. The physical environment of S61 is inspected using infrared to radio wavelength images. We also determined the Lyman continuum flux associated with the H II region and found that the H II region is formed by at least two massive stars (S1 and S2). We also analyzed the 12CO (J =3-2) JCMT data of S61, and a shell structure accompanying three molecular clumps are observed towards S61. We found that the ionized gas in S61 is surrounded by dust and a molecular shell. Many young stellar objects and three molecular clumps are observed at the interface of the ionized gas and the surrounding gas. The pressure at the interface is higher than in a typical cool molecular cloud., Comment: Paper is accepted for the publication in the Journal of Astrophysics and Astronomy
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- 2023
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15. Structural Analysis of Open Cluster Bochum 2
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Kaur, Harmeen, Sharma, Saurabh, Durgapal, Alok, Dewangan, Lokesh K, Verma, Aayushi, Panwar, Neelam, Pandey, Rakesh, and Ghosh, Arpan
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Astrophysics - Solar and Stellar Astrophysics ,Astrophysics - Astrophysics of Galaxies - Abstract
We present the results from our deep optical photometric observations of Bochum 2 (Boc2) star cluster obtained using the $1.3$m Devasthal Fast Optical Telescope along with archival photometric data from Pan-STARRS2/2MASS/UKIDSS surveys. We also used high-quality parallax and proper motion data from the $Gaia$ Data Release 3. We found that the Boc2 cluster has a small size ($\sim$1.1 pc) and circular morphology. Using $Gaia$ parallax of member stars and isochrone fitting method, the distance of this cluster is estimated as $3.8\pm0.4$ kpc. We have found that this cluster holds young ($\sim5$ Myr) and massive (O$7-$O$9$) stars as well as an older population of low mass stars. We found that the massive stars have formed in the inner region of the Boc2 cluster in a recent epoch of star formation. We have derived mass function slope ($\Gamma$) in the cluster region as $-2.42\pm0.13$ in the mass range $\sim0.72<$M/M$_{\odot}<2.8$. The tidal radius of the Boc2 cluster ($\sim7-9$) is much more than its observed radius ($\sim1.1$ pc). This suggests that most of the low-mass stars in this cluster are the remains of an older population of stars formed via an earlier epoch of star formation., Comment: accepted for publication in Journal of Astrophysics and Astronomy
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- 2023
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16. Physiological Basis of Plant Growth Promotion in Rice by Rhizosphere and Endosphere Associated Streptomyces Isolates from India
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Thenappan, Dhivya P., Pandey, Rakesh, Hada, Alkesh, Jaiswal, Dinesh Kumar, Chinnusamy, Viswanathan, Bhattacharya, Ramcharan, and Annapurna, Kannepalli
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- 2024
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17. Sleep quality mediates the association between chronotype and mental health in young Indian adults
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Chauhan, Satyam, Pandey, Rakesh, Vakani, Krupa, Norbury, Ray, Ettinger, Ulrich, and Kumari, Veena
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- 2024
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18. Spectroscopy of 9 eruptive young variables using TANSPEC
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Ghosh, Arpan, Sharma, Saurabh, Ninan, Joe P., Ojha, Devendra K., Gour, A. S., Pandey, Rakesh, Sinha, Tirthendu, Verma, Aayushi, Singh, Koshvendra, Ghosh, Supriyo, and Kaur, Harmeen
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Astrophysics - Solar and Stellar Astrophysics - Abstract
In recent times, 3.6m Devasthal Optical Telescope (DOT) has installed an optical to near infra-red spectrograph, TANSPEC, which provides spectral coverage from 0.55-2.5 microns. Using TANSPEC, we have obtained a single epoch spectrum of a set 9 FUors and EXors. We have analysed line profiles of the sources and compared with the previously published spectra of these objects. Comparing the line profile shapes with the existing theoretical predictions, we have tried to interpret the physical processes that are responsible for the current disc evolution and the present accretion dynamics. Our study has shown the importance for time evolved spectroscopic studies for better understanding the evolution of the accretion mechanisms. This in turn can help in better categorisation of the young stars displaying episodic accretion behaviour., Comment: 13 pages, 11 figures
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- 2023
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19. Teutsch 76: a Deep Near-Infrared Study
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Sharma, Saurabh, Dewangan, Lokesh, Panwar, Neelam, Kaur, Harmeen, Ojha, Devendra K., Yadav, Ramkesh, Verma, Aayushi, Baug, Tapas, Sinha, Tirthendu, Pandey, Rakesh, Ghosh, Arpan, and Chand, Tarak
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Astrophysics - Solar and Stellar Astrophysics ,Astrophysics - Astrophysics of Galaxies - Abstract
We have performed a detailed analysis on the Teutsch 76 (T76) open cluster using the deep near-infrared (NIR) observations taken with the TANSPEC instrument mounted on the 3.6m Devasthal Optical Telescope (DOT) along with the recently available high quality proper motion data from the {\it Gaia} data release 3 and deep photometric data from Pan-STARRS1 survey. We have found that the T76 cluster is having a central density concentration with circular morphology, probably due to the star formation processes. The radius of the T76 cluster is found to be 45$^{\prime}{^\prime}$ (1.24 pc) and 28 stars within this radius were marked as highly probable cluster members. We have found that the cluster is located at a distance of $5.7\pm1.0$ kpc and is having an age of $50\pm10$ Myr. The mass function slope ($\Gamma$) in the cluster region in the mass range $\sim$0.75$<$M/M$_\odot$$<$5.8 is estimated as $-1.3\pm0.2$, which is similar to the value `-1.35' given by \citet{1955ApJ...121..161S}. The cluster is not showing any signatures of mass-segregation and is currently undergoing dynamical relaxation., Comment: Accepted for publication in Journal of Astrophysics and Astronomy
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- 2023
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20. Annealing of MBE-grown CdTe epitaxial layer at various tellurium overpressure for reduced defect density
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Tyagi, Subodh, Goyal, Anshu, Rana, Sovinder Singh, Meena, Udai Ram, Mishra, Puspashree, Pandey, Rakesh Kumar, Dalal, Sandeep, Pandey, Akhilesh, Garg, Arun Kumar, Kumar, Shiv, and Singh, Rajendra
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- 2024
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21. Kronberger 55: A Candidate for End-dominated Collapse Scenario
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Verma, Aayushi, Sharma, Saurabh, Dewangan, Lokesh, Pandey, Rakesh, Baug, Tapas, Ojha, Devendra K., Ghosh, Arpan, and Kaur, Harmeen
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Astrophysics - Astrophysics of Galaxies ,Astrophysics - Solar and Stellar Astrophysics - Abstract
Using optical photometric observations from 1.3m Devasthal Fast Optical Telescope and deep near-infrared (NIR) photometric observations from TANSPEC mounted on 3.6m Devasthal Optical Telescope, along with the multi-wavelength archival data, we present our study of open cluster Kronberger 55 to understand the star formation scenario in the region. The distance, extinction and age of the cluster Kronberger 55 are estimated as ~3.5 kpc, E(B-V)~1.0 mag and $\lesssim$55 Myr, respectively. We identified Young Stellar Objects (YSOs) based on their excess infrared (IR) emission using the two-color diagrams (TCDs). The mid-infrared (MIR) images reveal the presence of extended structure of dust and gas emission along with the outflow activities in the region with two peaks, one at the location of cluster Kronberger 55 and another at 5'.35 southwards to it. The association of radio continuum emission with the southern peak, hints towards the formation of massive star/s. The Herschel sub-millimeter maps reveal the presence of two clumps connected with a filamentary strcuture in this region, and such configuration is also evident in the 12CO(1-0) emission map. Our study suggests that this region might be a hub-filament system undergoing star formation due to the 'end-dominated collapse scenario'., Comment: 14 pages, 11 figures, Accepted in Journal of Astrophysics and Astronomy (JAA)
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- 2023
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22. Star-forming site RAFGL 5085: Is a perfect candidate of hub-filament system ?
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Dewangan, L. K., Bhadari, N. K., Maity, A. K., Pandey, Rakesh, Sharma, Saurabh, Baug, T., and Eswaraiah, C.
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Astrophysics - Astrophysics of Galaxies - Abstract
To investigate the star formation process, we present a multi-wavelength study of a massive star-forming site RAFGL 5085, which has been associated with the molecular outflow, HII region, and near-infrared cluster. The continuum images at 12, 250, 350, and 500 $\mu$m show a central region (having M$_{\rm clump}$ $\sim$225 M$_{\odot}$) surrounded by five parsec-scale filaments, revealing a hub-filament system (HFS). In the {\it Herschel} column density ($N({{\rm{H}}}_{2})$) map, filaments are identified with higher aspect ratios (length/diameter) and lower $N({{\rm{H}}}_{2})$ values ($\sim$0.1--2.4 $\times$10$^{21}$ cm$^{-2}$), while the central hub is found with a lower aspect ratio and higher $N({{\rm{H}}}_{2})$ values ($\sim$3.5--7.0 $\times$10$^{21}$ cm$^{-2}$). The central hub displays a temperature range of [19, 22.5]~K in the {\it Herschel} temperature map, and is observed with signatures of star formation (including radio continuum emission). The JCMT $^{13}$CO(J= 3--2) line data confirm the presence of the HFS and its hub is traced with supersonic and non-thermal motions having higher Mach number and lower thermal to non-thermal pressure ratio. In the $^{13}$CO position-velocity diagrams, velocity gradients along the filaments toward the HFS appear to be observed, suggesting the gas flow in the RAFGL 5085 HFS and the applicability of the clump-fed scenario., Comment: 15 pages, 8 figures; Accepted for publication in Journal of Astrophysics and Astronomy (JOAA)
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- 2022
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23. TANSPEC: TIFR-ARIES Near Infrared Spectrometer
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Sharma, Saurabh, Ojha, Devendra K., Ghosh, Arpan, Ninan, Joe P., Ghosh, Supriyo, Ghosh, Swarna K., Manoj, P., Naik, Milind B., D'Costa, Savio L. A., Reddy, B. Krishna, Nanjappa, Nandish, Pandey, Rakesh, Sinha, Tirthendu, Panwar, Neelam, Antony, Susmitha, Kaur, Harmeen, Sahu, Sanjit, Bangia, Tarun, Poojary, Satheesha S., Jadhav, Rajesh B., Bhagat, Shailesh B., Meshram, Ganesh S., Shah, Harshit, Rayner, John T., Toomey, Douglas W., and Sandimani, Pradeep R.
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Astrophysics - Instrumentation and Methods for Astrophysics ,Astrophysics - High Energy Astrophysical Phenomena ,Astrophysics - Solar and Stellar Astrophysics - Abstract
We present the design and performance of the TANSPEC, a medium-resolution $0.55-2.5~\mu$m cryogenic spectrometer and imager, now in operation at the 3.6-m Devasthal Optical Telescope (DOT), Nainital, India. The TANSPEC provides three modes of operation which include, photometry with broad- and narrow-band filters, spectroscopy with short slits of 20$^{\prime \prime}$ length and different widths (from 0.5$^{\prime \prime}$ to 4.0$^{\prime \prime}$) in cross-dispersed mode at a resolving power R of $\sim$2750, and spectroscopy with long slits of 60$^{\prime \prime}$ length and different widths (from 0.5$^{\prime \prime}$ to 4.0$^{\prime \prime}$) in prism mode at a resolving power R of $\sim$100-350. TANSPEC's imager mode provides a field of view of 60$^{\prime \prime} \times 60^{\prime \prime}$ with a plate scale of 0.245$^{\prime \prime}$/pixel on the 3.6-m DOT. The TANSPEC was successfully commissioned during April-May 2019 and the subsequent characterization and astronomical observations are presented here. The TANSPEC has been made available to the worldwide astronomical community for science observations from October 2020., Comment: 35 pages, Accepted for publication in - Publications of the Astronomical Society of the Pacific (PASP)
- Published
- 2022
- Full Text
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24. A novel intuitionistic fuzzy rough instance selection and attribute reduction with kernelized intuitionistic fuzzy C-means clustering to handle imbalanced datasets
- Author
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Tiwari, Anoop Kumar, Nath, Abhigyan, Pandey, Rakesh Kumar, and Maratha, Priti
- Published
- 2024
- Full Text
- View/download PDF
25. Entropic Analysis of Reservation Policy of Government of India
- Author
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Pandey, Rakesh Kumar and Pandey, Maneesha
- Subjects
Physics - Physics and Society - Abstract
Analysis based on the Entropy estimates of the society is carried out on a mathematical model in this paper, to make an assessment of Reservation policy presently in operation in India. The Reservation Policy was provisioned in the constitution of India under the policy of affirmative action. The policy makers had identified some communities of India that were being discriminated socially. They identified them by noticing their dismal representation in positions of power and respect, within the society. It was argued that these communities are required to be treated differently to give them equal opportunity in the society. The policy makers had provisioned in the same policy that the effectiveness of this policy will be analyzed at regular intervals to decide its continuation or improvisation. An attempt is made here to scientifically analyze the effectiveness of this policy and suggest possible improvements in the same. As per the understanding of Entropy, a policy such as the Reservation Policy, that is intended to encourage equality must be associated with increase in the Entropy of the society. After a careful mathematical analysis, it is shown here that the policy, in its present form, is designed to increase the entropy of the society in the short-term scenario but is an iso-entropic policy in the long term. A way has been suggested to complement the policy to make the entropy increased effectively and permanently., Comment: 15 pages, 3 figures, 1 table
- Published
- 2022
26. Gaia 20eae: A newly discovered episodically accreting young star
- Author
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Ghosh, Arpan, Sharma, Saurabh, Ninan, Joe. P., Ojha, Devendra K., Bhatt, Bhuwan C., Kanodia, Shubham, Mahadevan, Suvrath, Stefansson, Gudmundur, Yadav, R. K., Gour, A. S., Pandey, Rakesh, Sinha, Tirthendu, Panwar, Neelam, Wisniewski, John P., Canas, Caleb I., Lin, Andrea S. J., Roy, Arpita, Hearty, Fred, Ramsey, Lawrence, Robertson, Paul, and Schwab, Christian
- Subjects
Astrophysics - Solar and Stellar Astrophysics ,Astrophysics - Astrophysics of Galaxies - Abstract
The Gaia Alert System issued an alert on 2020 August 28, on Gaia 20eae when its light curve showed a $\sim$4.25 magnitude outburst. We present multi-wavelength photometric and spectroscopic follow-up observations of this source since 2020 August and identify it as the newest member of the FUor/EXor family of sources. We find that the present brightening of Gaia 20eae is not due to the dust clearing event but due to an intrinsic change in the spectral energy distribution. The light curve of Gaia 20eae shows a transition stage during which most of its brightness ($\sim$3.4 mag) has occurred at a short timescale of 34 days with a rise-rate of 3 mag/month. Gaia 20eae has now started to decay at a rate of 0.3 mag/month. We have detected a strong P Cygni profile in H$\alpha$ which indicates the presence of winds originating from regions close to the accretion. We find signatures of very strong and turbulent outflow and accretion in Gaia 20eae during this outburst phase. We have also detected a red-shifted absorption component in all the Ca II IR triplet lines consistent with signature of hot in-falling gas in the magnetospheric accretion funnel. This enables us to constrain the viewing angle with respect to the accretion funnel. Our investigation of Gaia 20eae points towards magnetospheric accretion being the phenomenon for the current outburst., Comment: 17 pages, 11 figures, Accepted in Astrophysical Journal
- Published
- 2021
- Full Text
- View/download PDF
27. Sh 2-301: a blistered H II region undergoing star formation
- Author
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Pandey, Rakesh, Sharma, Saurabh, Dewangan, Lokesh K., Ojha, Devendra K., Panwar, Neelam, Das, Swagat, Bisen, D. P., Ghosh, Arpan, and Sinha, Tirthendu
- Subjects
Astrophysics - Astrophysics of Galaxies ,Astrophysics - Solar and Stellar Astrophysics - Abstract
We present a multiwavelength study of the H II region Sh 2-301 (S301) using deep optical data, near-infrared data, radio continuum data and other archival data at longer wavelengths. A cluster of young stellar objects (YSOs) is identified in the north-east (NE) direction of S301. The H{\alpha} and radio continuum images trace the distribution of the ionized gas surrounding a massive star ALS 207, and the S301 H II region is bounded by an arc-like structure of gas and dust emission in the south-eastern direction. The north-western part of S301 seems to be devoid of gas and dust emission, while the presence of molecular material between the NE cluster and the central massive star ALS 207 is found. The distribution of warm dust emission, ionized gas, and neutral hydrogen together suggests a blistered morphology of the S301 H II region powered by ALS 207, which appears to be located near the edge of the cloud. The location of the NE cluster embedded in the cold molecular cloud is found opposite to the blistered morphology. There is a noticeable age difference investigated between the massive star and the NE cluster. This age difference, pressure calculation, photodissociation regions (PDRs), and the distribution of YSOs favour the positive feedback of the massive star ALS 207 in S301. On a wider scale of S301, the H II region and the young stellar cluster are depicted toward the central region of a hub-filamentary system, which is evident in the infrared images., Comment: Accepted for publication in ApJ
- Published
- 2021
- Full Text
- View/download PDF
28. Unlocking the potential of depleted dry batteries: A dual-purpose approach for waste mitigation and sustainable energy production
- Author
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Pandey, Ravi Ranjan, Andola, Anshu, Pandey, Himani, Kashyap, Yashvant, Prakash, Anand, Nakanishi, Hideyuki, and Pandey, Rakesh K.
- Published
- 2024
- Full Text
- View/download PDF
29. Integration of miRNA dynamics and drought tolerant QTLs in rice reveals the role of miR2919 in drought stress response
- Author
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Kumar, Deepesh, Ramkumar, M. K., Dutta, Bipratip, Kumar, Ajay, Pandey, Rakesh, Jain, Pradeep Kumar, Gaikwad, Kishor, Mishra, Dwijesh C., Chaturvedi, K. K., Rai, Anil, Solanke, Amolkumar U., and Sevanthi, Amitha Mithra
- Published
- 2023
- Full Text
- View/download PDF
30. F-18 FDG PET/CT in staging and response assessment of primary cutaneous diffuse large B-cell lymphoma (leg type)
- Author
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Datta, Deepanksha, Pandey, Rakesh Ramprakash, Kumar, Rajesh, Sharma, Rashim, and Vedant, Deepak
- Published
- 2023
- Full Text
- View/download PDF
31. Supervised deep learning-based paradigm to screen the enhanced oil recovery scenarios
- Author
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Kumar Pandey, Rakesh, Gandomkar, Asghar, Vaferi, Behzad, Kumar, Anil, and Torabi, Farshid
- Published
- 2023
- Full Text
- View/download PDF
32. Entropic Analysis to Assess impact of Policies on Disorders and Conflicts within a system: Case Study of Traffic intersection as 12-Qubit Social Quantum System
- Author
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Pandey, Rakesh Kumar
- Subjects
Physics - Physics and Society ,Physics - Data Analysis, Statistics and Probability ,Quantum Physics - Abstract
Entropic analysis of a scenario at a traffic intersection is attempted in detail. The model is utilized to define Conflict Entropy. It is shown that with the use of strategies (policies) like installing traffic lights and construction of flyovers the Entropy is reduced thereby making the traffic ordered. It is shown that these policies help in reducing the Entropy and eliminating the Conflict Entropy completely in both the cases. Such an analysis can find immense application in deciding a favorable policy and in formulation of artificial intelligence algorithms. A striking similarity of the traffic intersection is found with Quantum systems of twelve qubits that opens up a new scope of study of traffic flows to understand the behavior of Quantum Systems., Comment: 12 pages, 9 figures, 1 table
- Published
- 2020
33. Star formation and evolution of blister-type H{\sc ii} region Sh2-112
- Author
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Panwar, Neelam, Sharma, Saurabh, Ojha, D. K., Baug, Tapas, Dewangan, L. K., Bhatt, B. C., and Pandey, Rakesh
- Subjects
Astrophysics - Solar and Stellar Astrophysics ,Astrophysics - Astrophysics of Galaxies - Abstract
We report the observational findings of the Sh2-112 H{\sc ii} region by using the multiwavelength data analysis ranging from optical to radio wavelengths. This region is powered by a massive O8V-type star BD +45 3216. The surface density distribution and minimum spanning tree analyses of the young stellar object (YSO) candidates in the region reveal their groupings toward the western periphery of the H{\sc ii} region. A GMRT radio continuum emission peak is found toward the north-west boundary of the H{\sc ii} region and is investigated as a compact/ultra-compact H{\sc ii} region candidate powered by a B0-B0.5 type star. Toward the south-west direction, a prominent curved rim-like structure is found in the H$\alpha$ image and GMRT radio continuum maps, where the H$_2$ and $^{13}$CO emission is also observed. These results suggest the existence of the ionized boundary layer (IBL) on the surface of the molecular cloud. This IBL is found to be over-pressurized with respect to the internal pressure of the surrounding molecular cloud. This implies that the shocks are propagating/ propagated into the molecular cloud and the young stars identified within it are likely triggered due to the massive star. It is also found that this region is ionization bounded toward the west-direction and density bounded toward the east-direction. Based on the distribution of the ionized gas, molecular material, and the YSO candidates; we propose that the Sh2-112 H{\sc ii} region is a good candidate for the blister-type H{\sc ii} region which has been evolved on the surface of a cylindrical molecular cloud., Comment: 18 pages, 9 figures, accepted for publication in the Astrophysical Journal
- Published
- 2020
- Full Text
- View/download PDF
34. Probing the physical conditions and star formation processes in the Galactic HII region S305
- Author
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Dewangan, L. K., Sharma, Saurabh, Pandey, Rakesh, del Palacio, S., Ojha, D. K., Benaglia, P., Baug, T., and Das, S. R.
- Subjects
Astrophysics - Astrophysics of Galaxies - Abstract
We present multi-scale and multi-wavelength observations of the Galactic HII region S305, which is excited by massive O8.5V and O9.5V stars. Infrared images reveal an extended sphere-like shell (extension ~7.5 pc; at T_d = 17.5-27 K) enclosing the S305 HII region (size ~5.5 pc; age ~1.7 Myr). The extended structure observed in the Herschel temperature map indicates that the molecular environment of S305 is heated by the massive O-type stars. Regularly spaced molecular condensations and dust clumps are investigated toward the edges of the infrared shell, where the PAH and H_2 emission is also observed. The molecular line data show a signature of an expanding shell of molecular gas in S305. GMRT 610 and 1280 MHz continuum maps reveal overdensities of the ionized emission distributed around two O-type stars, which are surrounded by the horseshoe envelope (extension ~2.3 pc). A molecular gas deficient region/cavity is identified toward the center of the horseshoe envelope, which is well traced with PAH, H_2, molecular, and dust emission. The edges of the infrared shell are found to be located in the front of the horseshoe envelope. All these outcomes provide the observational evidence of the feedback of O-type stars in S305. Moreover, non-thermal radio emission is detected in S305 with an average spectral index alpha ~-0.45. The variations in alpha, ranging from -1.1 to 1.3, are explained due to soft synchrotron emission and either optically-thicker thermal emission at high frequencies or a suppression of the low-frequency emission by the Razin-Tsytovich effect., Comment: 21 pages, 13 figures, Accepted for publication in The Astrophysical Journal
- Published
- 2020
- Full Text
- View/download PDF
35. Stellar cores in the Sh 2-305 H II region
- Author
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Pandey, Rakesh, Sharma, Saurabh, Panwar, Neelam, Dewangan, Lokesh K., Ojha, Devendra K., Bisen, D. P., Sinha, Tirthendu, Ghosh, Arpan, and Pandey, Anil K.
- Subjects
Astrophysics - Solar and Stellar Astrophysics ,Astrophysics - Astrophysics of Galaxies - Abstract
Using our deep optical and near-infrared photometry along with multiwavelength archival data, we here present a detailed study of the Galactic H II region Sh 2-305, to understand the star/star-cluster formation. On the basis of excess infra-red emission, we have identified 116 young stellar objects (YSOs) within a field of view of ~ 18.5 arcminute x 18.5 arcminute, around Sh 2-305. The average age, mass and extinction (A_V) for this sample of YSOs are 1.8 Myr, 2.9 solar mass and 7.1 mag, respectively. The density distribution of stellar sources along with minimal spanning tree calculations on the location of YSOs reveals at least three stellar sub-clusterings in Sh 2-305. One cluster is seen toward the center (i.e., Mayer 3), while the other two are distributed toward the north and south directions. Two massive O-type stars (VM2 and VM4; ages ~ 5 Myr) are located at the center of the Sh 2-305 H II region. The analysis of the infrared and radio maps traces the photon dominant regions (PDRs) in the Sh 2-305. Association of younger generation of stars with the PDRs is also investigated in the Sh 2-305. This result suggests that these two massive stars might have influenced the star formation history in the Sh 2-305. This argument is also supported with the calculation of various pressures driven by massive stars, slope of mass function/K-band luminosity function, star formation efficiency, fraction of Class I sources, and mass of the dense gas toward the sub-clusterings in the Sh 2-305.
- Published
- 2020
- Full Text
- View/download PDF
36. Attenuated maladaptive emotion processing as a potential mediator of the relationship between dispositional mindfulness and mental health
- Author
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Pandey, Rakesh, Mandal, Satchit Prasun, Shukla, Meenakshi, Tripathi, Vishnukant, Antonova, Elena, and Kumari, Veena
- Published
- 2023
- Full Text
- View/download PDF
37. Star-forming site RAFGL 5085: Is a perfect candidate of hub-filament system?
- Author
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Dewangan, L. K., Bhadari, N. K., Maity, A. K., Pandey, Rakesh, Sharma, Saurabh, Baug, T., and Eswaraiah, C.
- Published
- 2023
- Full Text
- View/download PDF
38. A robust deep structured prediction model for petroleum reservoir characterization using pressure transient test data
- Author
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Pandey, Rakesh Kumar, Kumar, Anil, and Mandal, Ajay
- Published
- 2022
- Full Text
- View/download PDF
39. Metaheuristic algorithm integrated neural networks for well-test analyses of petroleum reservoirs
- Author
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Kumar Pandey, Rakesh, Aggarwal, Shrey, Nath, Griesha, Kumar, Anil, and Vaferi, Behzad
- Published
- 2022
- Full Text
- View/download PDF
40. Studies into the Synergy Between MoS2-rGO-gC3N4 for Photocatalytic and Supercapacitor Applications.
- Author
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Neha, Andola, Anshu, Pandey, Ravi R., Pandey, Rakesh K., Rambabu, P., Das, Pradip, Rabani, Iqra, and Turpu, G. R.
- Subjects
BAND gaps ,RHODAMINE B ,ENERGY density ,ENERGY storage ,POWER density - Abstract
Flower-like MoS
2 and its composites with reduced graphene oxide (rGO) and graphitic carbon nitride (gC3 N4 ) were prepared to study their suitability in environmental and energy applications. The materials were well characterized by standard techniques. Optical band gaps of all the materials were in the visible region, making them suitable for visible-light photocatalysis applications. The photocatalytic studies have demonstrated that rGO-MoS2 exhibits a much better photodegradation performance than other materials in the study towards methylene blue (MB) and rhodamine B (RhB) dye degradation. The degradation efficiencies of rGO-MoS2 were found to be 83% in 105 min for MB dye and 82% in just 30 min for RhB dye. Two-dimensional rGO sheets greatly improved the photocatalytic performance of the rGO-MoS2 nanocomposite due to the reduction in the electron–hole recombination rate. Electrochemical studies on the samples showed superior performance for rGO-MoS2 with the specific capacitance of 152 F/g at 35 mA/cm2 , having an energy density of 5.3 Wh/kg at a power density of 337 W/kg. [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
- View/download PDF
41. Reflectance based non-destructive determination of colour and ripeness of tomato fruits
- Author
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Kumar, Rajeev, Paul, Vijay, Pandey, Rakesh, Sahoo, R. N., and Gupta, V. K.
- Published
- 2022
- Full Text
- View/download PDF
42. The houbara bustard: a thematic analysis of a bird's threatened extinction and a government's accountability failure
- Author
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Adler, Ralph, Mansi, Mansi, and Pandey, Rakesh
- Published
- 2021
- Full Text
- View/download PDF
43. Atomic structure and radiative properties of He-like [Ni.sup.26+] ion in dense plasma
- Author
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Dimri, Mayank, Dawra, Dishu, Singh, A.K., Jha, Alok K.S., Pandey, Rakesh Kumar, and Mohan, Man
- Subjects
Nickel -- Atomic properties -- Chemical properties ,Ions -- Atomic properties -- Chemical properties ,Plasma (Ionized gases) -- Research ,High temperature plasmas -- Research ,Physics - Abstract
The influence of plasma screening on the excitation energies and transition properties of He-like [Ni.sup.26+] ion under strongly coupled plasma background has been analyzed. To perform the analysis, the multi-configuration Dirac-Fock method has been adopted by incorporating the ion sphere model potential as a modified interaction potential between the electron and the nucleus. For comparison purposes, parallel calculations have been carried out using the modified relativistic configuration interaction method. It is found that the transition energies corresponding to principal quantum number conserving transitions ([delta]n = 0) are blue shifted, whereas they are redshifted for the transitions where the principal quantum number is not conserved ([delta]n [not equal to] 0). The variation of transition probabilities and weighted oscillator strengths with free electron densities has also been studied. The present results should be advantageous in the modeling and diagnostics of astrophysical and laboratory plasmas. Key words: strongly coupled plasma, ion sphere model, atomic structure, transition properties. Nous analysons l'influence de l'ecrantage de Debye sur les energies d'excitation et les proprietes de transition de l'ion [Ni.sup.26+] de type He sous fond de plasma fortement couple. Afin de completer cette etude, nous adoptons la methode de Dirac-Fock multi-configurations en incorporant le potentiel du modele de la sphere ionique (MSI/ISM) comme un potentiel d'interaction modifiee entre l'electron et le noyau. Pour fins de comparaison, des calculs sont faits en parallele en utilisant la methode modifiee d'interaction relativiste de configurations. Nous trouvons que les deplacements d'energie du plasma qui correspondent aux transitions conservant le nombre quantique principal ([delta]n = 0) se font vers le bleu, alors qu'elles vont vers le rouge si n n'est pas conserve ([delta]n [not equal to] 0). Nous etudions aussi la variation des probabilites de transition et des forces d'oscillateur ponderees selon la densite des electrons libres. Nos resultats devraient etre utiles a la modelisation et au diagnostic des plasmas en laboratoire et en astrophysique. [Traduit par la Redaction] Mots-cles : plasma fortement couple, modele de la sphere ionique, structure atomique, proprietes de transition., 1. Introduction Investigation of the structural properties of atomic systems in strongly coupled plasma environments has attracted a lot of attention during the past several years due to their practical [...]
- Published
- 2021
- Full Text
- View/download PDF
44. Swertiamarin from Enicostemma littorale, counteracts PD associated neurotoxicity via enhancement α-synuclein suppressive genes and SKN-1/NRF-2 activation through MAPK pathway
- Author
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Pandey, Taruna, Shukla, Aparna, Trivedi, Mashu, Khan, Feroz, and Pandey, Rakesh
- Published
- 2021
- Full Text
- View/download PDF
45. Run-time adaptive data page mapping: A Comparison with 3D-stacked DRAM cache
- Author
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Pandey, Rakesh and Sahu, Aryabartta
- Published
- 2020
- Full Text
- View/download PDF
46. 5′-Hydroxy-6, 7, 8, 3′, 4′-pentamethoxyflavone extends longevity mediated by DR-induced autophagy and oxidative stress resistance in C. elegans
- Author
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Trivedi, Shalini and Pandey, Rakesh
- Published
- 2021
- Full Text
- View/download PDF
47. Dynamics of a network mediated by IL-36 and involved in the pathogenesis of psoriasis.
- Author
-
Pandey, Sneha, Tiwari, Syona, Basu, Sulagna, Mishra, Rajiv Kumar, and Pandey, Rakesh
- Subjects
PATHOGENESIS ,PSORIASIS ,KERATINOCYTES ,CELL communication ,SYSTEMS biology ,COMPUTATIONAL biology - Abstract
The pathogenesis of the inflammatory, chronic, and common skin disease psoriasis involves immune cells, skin cells (keratinocytes), and the cytokines they secrete. Hyperproliferation and abnormal differentiation of keratinocytes are hallmarks of the disease. The roles of cytokines such as TNFa, IL-15, IL-17, and IL-23 in psoriasis have been studied through mathematical/computational models as well as experiments. However, the role of proinflammatory cytokine IL-36 in the onset and progression of psoriasis is still elusive. To explore the role of IL-36, we construct a network embodying indirect cell-cell interactions of a few immune and skin cells mediated by IL-36 based on existing knowledge. We also develop a mathematical model for the network and perform a global sensitivity analysis. Our results suggest that the model is most sensitive to a parameter that represents the level of cytokine IL-36. In addition, a steady-state analysis of the model suggests that an increase in the level of IL-36 could lead to the hyperproliferation of keratinocytes and, thus, psoriasis. Our analysis also highlights that the plaque formation and progression of psoriasis could occur through either a gradual or a switch-like increase in the keratinocyte population. We propose that the switch-like increase would be due to a bistable behavior of the network toward either a psoriatic or healthy state and could be used as a novel treatment strategy. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
48. Optimizing nutrient sources for quality bulb and bulblet production in LA hybrid lilium: A study in the North Indian plains.
- Author
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Saraswati, Singh, M. K., Namita, Sindhu, S. S., Meena, M. C., and Pandey, Rakesh
- Subjects
LILIES ,MANURES ,FERTILIZERS ,PLAINS - Abstract
LA hybrid lilium cv. 'Masai' bulbs were grown over two consecutive growth seasons in a net house to enhance the yield of high-quality bulbs and bulblets, utilizing both organic and inorganic nutrients. The experiment tested five levels of organic manure (FYM) (0, 10, 15, 20, and 25 t ha
-1 ) and inorganic fertilizers (0, 40+30+25, 80+60+50, 120+90+75, and 160+120+100 N+P2 O5 +K2 O kg ha-1 ). It assessed both individual and combined effects of nutrient sources, concluding that their combined application was most beneficial. Treatment T24 , comprising 25 t FYM with 160 kg N, 120 kg P2 O5 , and 100 kg K2 O ha-1 , proved to be the most effective. The study revealed that treatment T24 resulted in the largest bulb circumference, the highest number of bulblets per plant, the greatest bulblet circumference, and the highest fresh and dry weights of both bulbs and bulblets per plant. It also led to the best relative growth rate (RGR) of the bulb, as well as the most efÏcient partitioning rates at both the flowering and harvest stages. Treatment T23 notably influenced the fresh and dry weights of the bulblets. The data suggest that T24 produces bulbs and bulblets of superior quality compared to other treatments, making it a viable choice for the commercial cultivation of quality LA hybrid lilium bulbs and bulblets in the plains of India. [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
- View/download PDF
49. Tata Memorial Centre Evidence Based Use of Nuclear medicine diagnostic and treatment modalities in cancer
- Author
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Puranik, Ameya D., primary, Choudhury, Sayak, additional, Ghosh, Suchismita, additional, Dev, Indraja D., additional, Ramchandani, Varun, additional, Uppal, Abhishek, additional, Bhosale, Vikrant, additional, Palsapure, Abhishek, additional, Rungta, Rachita, additional, Pandey, Rakesh, additional, Khatri, Shweta, additional, George, Gemson, additional, Satamwar, Yogesh, additional, Maske, Rahul, additional, Agrawal, Archi, additional, Shah, Sneha, additional, Purandare, Nilendu C., additional, and Rangarajan, Venkatesh, additional
- Published
- 2024
- Full Text
- View/download PDF
50. Identifying characteristics of adolescents with persistent loneliness during COVID‐19: A multi‐country eight‐wave longitudinal study
- Author
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Riddleston, Laura, primary, Shukla, Meenakshi, additional, Lavi, Iris, additional, Saglio, Eloise, additional, Fuhrmann, Delia, additional, Pandey, Rakesh, additional, Singh, Tushar, additional, Qualter, Pamela, additional, and Lau, Jennifer Y. F., additional
- Published
- 2023
- Full Text
- View/download PDF
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