Publications (57)
Coefficients of the Inverse Functions and Radius Estimates of Certain Starlike Functions
Adiba Naz, Sushil Kumar, V. Ravichandran
Ma-Minda class (of starlike functions) consists of all normalized analytic functions on the unit disk for which the image of is contained in the some starlike reg…
Constrained Radius Estimates Of Certain Analytic Functions
Meghna Sharma, Naveen Kumar Jain, Sushil Kumar
Let denote the Carathéodory class accommodating all the analytic functions having positive real part and satisfying . In this paper, the second coefficie…
The cluster-core model for halo-structure of light nuclei at the drip lines
Raj K. Gupta, Sushil Kumar, M. Balasubramaniam +2
Nuclei at both the neutron- and proton-drip lines are studied. In the cluster-core model, the halo-structure of all the observed and proposed cases of neutron- or proton-halos is i…
Anisotropy in interface stress at the BCC-iron solid-melt interface: molecular dynamics and phase field crystal modelling
Sushil Kumar, Ming-Wei Liu, Kuo-An Wu +1
The interface stresses at of the solid-melt interface are, in general, anisotropic. The anisotropy in the interfacial stress can be evaluated using molecular dynamics (MD) and phas…
Observations of the Quiet Sun During the Deepest Solar Minimum of the Past Century with Chandrayaan-2 XSM -- Elemental Abundances in the Quiescent Corona
Santosh V. Vadawale, Biswajit Mondal, N. P. S. Mithun +12
Elements with low First Ionization Potential (FIP) are known to be three to four times more abundant in active region loops of the solar corona than in the photosphere. There have…
Large-Time-Step Operation in a Volume Integral Equation for Dielectric Scattering
Sushil Kumar, Giampiero Gerini, M. C. van Beurden
The paper presents a method to use much larger time steps in a time‑domain volume integral equation solver for dielectric scattering, employing a matrix‑free FFT approach to accele…
Differential Subordinations For Functions With Positive Real Part Using Admissibility Conditions
Meghna Sharma, Sushil Kumar, Naveen Kumar Jain
Some sufficient conditions on certain constants which are involved in some first, second and third order differential subordinations associated with certain functions with positive…
First order differential subordination for functions with positive real part
O. P. Ahuja, Sushil Kumar, V. Ravichandran
Sharp estimates on are determined so that an analytic function defined on the open unit disk in the complex plane normalized by is subordinate to some well known…
Causality-Aware Interaction Selection for Retarded Green-Function Assembly
Sushil Kumar, Wolf van der Hert, Giampiero Gerini +1
In time-domain integral-equation (TDIE) solvers, the assembly of the retarded Green-function interactions remains a major computational bottleneck. We present a causality-aware ass…
Sharp Estimates on Coefficient functionals of Ozaki close-to-convex functions
Sushil Kumar, Rakesh Kumar pandey, Pratima Rai
The goal of this manuscript to establish the best possible estimate on coefficient functionals like Hermitian-Toeplitz determinant of secoend order involving logarithmic coefficien…
Observations of the Quiet Sun During the Deepest Solar Minimum of the Past Century with Chandrayaan-2 XSM -- Sub-A Class Microflares Outside Active Regions
Santosh V. Vadawale, N. P. S. Mithun, Biswajit Mondal +12
Solar flares, with energies ranging over several orders of magnitude, result from impulsive release of energy due to magnetic reconnection in the corona. Barring a handful, almost…
The formation and decay of superheavy nuclei produced in -induced reactions
Sushil Kumar, M. Balasubramaniam, Raj K. Gupta +2
The formation of superheavy nuclei in , , and reactions and their subsequent decay are studied within the quantum mechanical fr…
Differential Subordination for Janowski Functions with Positive Real Part
Swati Anand, Sushil Kumar, V. Ravichandran
Theory of differential subordination provides techniques to reduce differential subordination problems into verifying some simple algebraic condition called admissibility condition…
Geometrical Localization Algorithm for 3-D Wireless Sensor Networks
Rajesh Kumar, Sushil Kumar, Diksha Shukla +1
In this paper, we propose an efficient range free localization scheme for large scale three dimensional wireless sensor networks. Our system environment consists of two type of sen…
Coherence of resonant-tunneling transport in terahertz quantum-cascade lasers
Sushil Kumar, Qing Hu
We develop simple density-matrix models to describe the role of coherence in resonant-tunneling (RT) transport of quantum-cascade lasers (QCLs). Specifically, we investigate the ef…
Nanoparticles and Quantum Dots as Emerging Optical Sensing Platforms for Detection: Recent Approaches and Perspectives
Sudhanshu Naithani, Heena, Pooja Sharma +4
Over the preceding years, nickel (Ni) and its compounds have been increasingly employed in various aspects of human social life, metallurgical/industrial manufactures, healthcare,…
RIS-Assisted THz MIMO Wireless System in the Presence of Direct Link for CV-QKD with Limited Quantum Memory
Sushil Kumar, Soumya P. Dash
A reconfigurable intelligent surface (RIS)-aided multiple-input multiple-output (MIMO) wireless communication system is considered in this paper wherein the transmitter, Alice modu…
Review of magnetic- and antimagnetic-rotational structures in nuclei
Sushil Kumar, Sukhjeet Singh, Balraj Singh +2
This work is an update of the 2000 publication of magnetic-rotational bands by Amita et al. [1], followed by an unpublished update of 2006 [2], and reviews detailed experimental da…
RIS-Assisted MIMO CV-QKD at THz Frequencies: Channel Estimation and SKR Analysis
Sushil Kumar, Soumya P. Dash, Debasish Ghose +1
In this paper, a multiple-input multiple-output (MIMO) wireless system incorporating a reconfigurable intelligent surface (RIS) to efficiently operate at terahertz (THz) frequencie…
MOF-derived Fe-doped -MnO nanoflowers as oxidase mimics: Chromogenic sensing of Hg and hydroquinone in aqueous media
Udisha Duhan, Arnab Pan, Ritesh Dubey +3
Structure and morphology play a crucial role in enhancing the biomimetic oxidase activity of nanozymes. In this study, a facile \emph{in situ} chemical oxidation strategy was emplo…
Performance Analysis of One- and Two-way DV-QKD with MIMO FSO Communication Systems
Sushil Kumar, Soumya P. Dash, George C. Alexandropoulos
This paper considers a multiple-input multiple-output (MIMO) wireless system wherein two legitimate users attempt to exchange secret keys over free-space optical (FSO) channels. No…
Modelling and Systematics of Quasiparticle Rotational Bands in Isotonic Chains
Pinky, Sushil Kumar, Sukhjeet Singh +1
We analyze the quasiparticle rotational bands along the isotonic chains using semi-empirical model in which first and higher order Cori…
Design principles for metal-organic receptors targeting optical recognition of Pd(II) in environmental matrices
Sudhanshu Naithani, Pramod Kumar, Ritesh Dubey +4
A precise detection of palladium (Pd) ions is a critical challenge with significant socio-economic implications across various industrial and chemical sectors. Due to its widesprea…
Resolving Semantic Confusions for Improved Zero-Shot Detection
Sandipan Sarma, Sushil Kumar, Arijit Sur
Zero-shot detection (ZSD) is a challenging task where we aim to recognize and localize objects simultaneously, even when our model has not been trained with visual samples of a few…
Structure effects in the region of superheavy elements via the -decay chain of 118
Raj K. Gupta, Sushil Kumar, Rajesh Kumar +2
The -decay chain of 118, first proposed in the Berkeley cold fusion experiment Pb(Kr,1n) and now retracted, is calculated by using the preformed cluster…
One Year of ASPEX-STEPS Operation: Characteristic Features, Observations and Science Potential
Jacob Sebastian, Bijoy Dalal, Aakash Gupta +26
The SupraThermal and Energetic Particle Spectrometer (STEPS), a subsystem of the Aditya Solar wind Particle EXperiment (ASPEX) onboard India's Aditya-L1 satellite, is designed to s…
Decay studies of alpha-decay chains
Sushil Kumar, Shagun Thakur, Rajesh Kumar
The -decay chains of are studied along with the possible cluster decay modes by using the preformed cluster model (PCM). The calculated -decay half-lives ar…
Alpha decay chains study for the recently observed superheavy element Z=117 within the Isospin Cluster Model
Sushil Kumar
The recently observed -decay chains were produced by the fusion reactions with target and projectile at Dubna in Russia. The reported cross…
One year of ASPEX-SWIS operation -- Characteristic features, observations and science potential
Abhishek Kumar, Shivam Parashar, Prashant Kumar +26
The Aditya-L1 mission, India's first dedicated solar observatory positioned at the first Lagrange point (L1) of the Sun-Earth system, carries the Solar Wind Ion Spectrometer (SWIS)…
Differential Subordination implications for Certain Carathéodory functions
Meghna Sharma, Sushil Kumar, Naveen Kumar Jain
In this article, we wish to establish some first order differential subordination relations for certain Carathéodory functions with nice geometrical properties. Moreover, several…
Evidence for in situ particle energization during the May-2024 event based on ASPEX instrument on board Aditya-L1
Shivam Parashar, Dibyendu Chakrabarty, Prashant Kumar +26
The interaction between interplanetary Coronal Mass Ejection (ICME) structures can alter the geo-effectiveness of the ICME events in myriad ways. Many aspects of these interaction…
Solar X-ray Monitor (XSM) On-board Chandrayaan-2 Orbiter
M. Shanmugam, S. V. Vadawale, Arpit R. Patel +17
Solar X-ray Monitor (XSM) is one of the scientific instruments on-board Chandrayaan-2 orbiter. The XSM along with instrument CLASS (Chandras Large Area Soft x-ray Spectrometer) com…
Thresholdless Coherent Light Scattering from Subband-polaritons in a Strongly-Coupled Microcavity
Johannes Gambari, Antonio I Fernandez-Dominguez, Stefan A Maier +5
We study a "strongly-coupled" (SC) polariton system formed between the atom-like intersubband transitions in a semiconductor nanostructure and the THz optical modes that are locali…
Solar X-ray Monitor On Board the Chandrayaan-2 Orbiter: In-flight Performance and Science Prospects
N. P. S. Mithun, Santosh V. Vadawale, Aveek Sarkar +14
The Solar X-ray Monitor (abbreviated as XSM) on board India's Chandrayaan-2 mission is designed to carry out broadband spectroscopy of the Sun from lunar orbit. It observes the Sun…
Interdigitated flexible supercapacitor using activated carbon synthesized from biomass for wearable energy storage
Ankit Singh, Kaushik Ghosh, Sushil Kumar +4
We have developed a flexible, interdigitated supercapacitor with high energy storing capacity for wearable, flexible electronic application. Locally obtained low cost biomass (bana…
Sharp bounds on Coefficient functionals of certain Sakaguchi functions
Sushil Kumar, Rakesh Kumar Pandey, Pratima Rai
We determine sharp bounds on some Hankel determinants involving initial coefficients, inverse coefficients, and logarithmic inverse coefficients for two subclasses of Sakaguchi fun…
Large static tuning of narrow-beam terahertz plasmonic lasers operating at 78 K
Chongzhao Wu, Yuan Jin, John L. Reno +1
A new tuning mechanism is demonstrated for single-mode metal-clad plasmonic lasers, in which refractive-index of the laser's surrounding medium affects the resonant-cavity mode in…
High-spin spectroscopy in At: Evidence of a 29/2 isomeric state
Khamosh Yadav, A. Y. Deo, Madhu +13
Yrast and near-yrast states above the known 25/2 isomer in At are established for the first time. The level scheme is extended up to 47/2 and 6.5 MeV with the…
Alpha Particle X-Ray Spectrometer (APXS) On-board Chandrayaan-2 Rover -- Pragyan
M. Shanmugam, S. V. Vadawale, Arpit R. Patel +19
Alpha Particle X-ray Spectrometer (APXS) is one of the two scientific experiments on Chandrayaan-2 rover named as Pragyan. The primary scientific objective of APXS is to determine…
Pb-Radioactivity in superheavy elements
Sushil Kumar
The Pb-radioactivity in the superheavy mass region is studied within the frame work of PCM model,the calculation of Pb-Radioactivity looks favorably for the cluster decay studies i…
Energetic ( 2 MeV) ion fluxes measured by ASPEX-STEPS on board Aditya-L1 during its earth-bound phase
Dibyendu Chakrabarty, Bijoy Dalal, Santosh Vadawale +26
During its earth-bound phase of the Aditya-L1 spacecraft of India, the Supra-Thermal and Energetic Particle Spectrometer (STEPS) of the Aditya Solar wind Particle EXperiment (ASPEX…
Certain Estimates of Normalized Analytic Functions
Swati Anand, Naveen Kumar Jain, Sushil Kumar
Let be a normalized convex function defined on open unit disk . For a unified class of normalized analytic functions which satisfy the second order differential su…
Terahertz plasmonic laser radiating in an ultra-narrow beam
Chongzhao Wu, Sudeep Khanal, John L. Reno +1
Plasmonic lasers (spasers) generate coherent surface-plasmon-polaritons (SPPs) and could be realized at subwavelength dimensions in metallic cavities for applications in nanoscale…
Ground Calibration of Solar X-ray Monitor On-board Chandrayaan-2 Orbiter
N. P. S. Mithun, Santosh V. Vadawale, M. Shanmugam +14
Chandrayaan-2, the second Indian mission to the Moon, carries a spectrometer called the Solar X-ray Monitor (XSM) to perform soft X-ray spectral measurements of the Sun while a com…
Sharp Bohr Radius Constants For Certain Analytic Functions
Swati Anand, Naveen Kumar Jain, Sushil Kumar
The Bohr radius for a class consisting of analytic functions in unit disc is the largest …
High-Entropy Oxide Nanostructures for Rapid and Sustainable Nitrophenol Reduction
Anjali Varshney, Aishwery J. Verma, Ritesh Dubey +3
High-entropy materials have emerged as a promising class of catalysts, driven by their high configurational entropy originating from structural disorder in single-phase multicompon…
Secret Key Rate Analysis of RIS-Assisted THz MIMO CV-QKD Systems under Access-Constrained Eavesdropping
Sushil Kumar, Soumya P. Dash, George C. Alexandropoulos
A reconfigurable intelligent surface (RIS)-assisted multiple-input multiple-output (MIMO) continuous-variable quantum key distribution (CV-QKD) system operating at terahertz (THz)…
Generalized radius problems for quotient functions having fixed second coefficient
Swati Anand, Naveen Kumar Jain, Sushil Kumar
In this manuscript, we deal with three classes of quotient functions having fixed second coefficient described on open unit disk. The radius of strongly starlikeness, lemniscate st…
Rapid reduction of nitrophenols using reusable magnetic \textit{h}-BN/Ni--NiO nanocomposites
Anjali Varshney, Ritesh Dubey, Sushil Kumar +2
The efficient and cost-effective conversion of nitro compounds to amines is crucial for industrial processes and environmental remediation, highlighting the growing demand for eart…
MIMO FSO Systems in Hybrid Quantum Noise Environments: SKR Analysis with One- and Two-way CV-QKD Protocols
Sushil Kumar, Soumya P. Dash, George C. Alexandropoulos
This paper studies a multiple-input multiple-output (MIMO) free-space optical (FSO) communication system employing continuous-variable quantum key distribution (CV-QKD), with the g…
A Pyridyl-Benzimidazole Based Ruthenium(II) Complex as Optical Sensor: Targeted Cyanide Detection and Live Cell Imaging Applications
Sudhanshu Naithani, Franck Thetiot, Vikas Yadav +5
The extreme toxicity of cyanide (\ce{CN^-}) ions in diverse environmental media has garnered significant attention toward the design of well-organized molecular probes for their se…
Certain subclasses of Analytic Functions with Fixed Second Coefficient
Sushil Kumar, Swati Anand, Naveen Kumar Jain
This paper aims to pursue some classes of normalized analytic functions with fixed second coefficient defined on open unit disk, such that and ${(1+z)f(z)}/…
Shell closure effects studied via cluster decay in heavy nuclei
Sushil Kumar, Ramna, Rajesh Kumar
The effects of shell closure in nuclei via the cluster decay is studied. In this context, we have made use of the Preformed Cluster Model () of Gupta and collaborators based o…
Multi-directional investigations on quiet time suprathermal ions measured by ASPEX-STEPS on-board Aditya L1
Aakash Gupta, Dibyendu Chakrabarty, Santosh Vadawale +26
The origin, acceleration and anisotropy of suprathermal ions in the interplanetary medium during quiet periods have remained poorly understood issues in solar wind physics. To addr…
Features of Two-Quasiparticle Rotational Bands in Deformed Odd-Odd Nuclei,
Pinky, Sushil Kumar, Sukhjeet Singh +1
In present work, we evaluated the experimental data pertains to two quasiparticle rotational structures in deformed odd-odd nuclei in rare earth mass region. The compilation includ…
Starlikeness Using Special Functions and Subordination
Meghna Sharma, Naveen Kumar Jain, Sushil Kumar
The association of subordination and special functions is used to find sharp estimates on the parameter such that the analytic function is subordinate to certain functi…
Theoretical Studies of Rare-Earth Nuclei leading to Sn-Daughter Products and the Associated Shell Effects
Sushil Kumar
Cluster decays of rare-earth nuclei are studied with a view to look for neutron magic shells for the Sn nucleus as the daughter product always. The Sn and Sn…