Conveners
Oral Presentations: Track 01
- Abinash Das (North Lakhimpur University)
- Prabwal Jyoti Phukon (Dibrugarh University)
Oral Presentations: Track 03
- Kakali Bhuyan (North Lakhimpur University)
- S. N. Pandey (MN-NIT, Prayagraj)
Oral Presentations: Track 02
- Pabitra Nath (Tezpur University)
- Dipika Robidas (North Lakhimpur University)
Oral Presentations: Track 04
- Litul Bokatial (North Lakhimpur University)
Description
Oral Presentations
This work presents the methodology and results of calibrating an organic liquid scintillator (EJ-315) [1] for gamma-ray spectroscopy using standard gamma sources, followed by spectral unfolding using a pre-determined detector response matrix using GEANT4 [2]. Energy calibration was performed via identification of known gamma peaks, and their Compton edge positions from Ba-133, Co-60, Na-22,...
A minimal and predictive Majorana neutrino mass matrix texture is proposed. The texture involves four parameters that reveal unique correlations and predict the three neutrino mass eigenvalues, while strictly ruling out the inverted hierarchy. Furthermore, it imposes constraints on the three CP-violating phases. Based on these predictions, we estimate both the effective Majorana neutrino mass...
Secure long-distance communication has become a fundamental requirement in modern information systems, particularly in satellite-based networks where the exchange of sensitive data across vast distances is often exposed to eavesdropping, signal degradation, and transmission errors. Classical communication systems, though widely deployed, face limitations in ensuring unconditional security due...
Abstract: Tunability of the Ne ฬel temperatures (TN) in case of antiferromagnetic (AFM) materials has significanct importance in exchange bias studies, magnetic and spintronic device applications etc. Interestingly, AFM transition metal oxide thin films demonstrate TN dependance on film thickness and stoichiometry. This article reports the estimation of TN for AFM nickel oxide (NiO) ultrathin...
We investigate Hawking radiation of spin-1/2 particles from a five-dimensional Myers-Perry black hole with two independent rotation parameters. Using the semiclassical WKB approximation applied to the covariant Dirac equation, we compute the fermionic tunneling probability and recover the standard Hawking temperature at the outer horizon. Extending the analysis to include the inner horizon, we...
The ability to generate and control spin current efficiently is a central challenge for advancing next-generation spintronic technologies. While nonmagnetic materials typically host spin Hall conductivity (SHC) [1] and ferromagnets are studied for anomalous Hall conductivity (AHC) [2], realizing both effects within a single material system remains rare and highly desirable for multifunctional...
Neuron excitation and generation of action potential can be simplified by using the FitzHughโNagumo (FHN) model [1]. Such models are not only required for understanding complex neural activity but also to predict and replicate in software and hardware [2]. Hardware emulation is indispensable for building brain computing platforms inspired by brain, medical devices and analyzing real time...
In this work, we investigate the nonlinear structures excited by moving external charged debris in a collisionless, unmagnetized plasma with thermal ions and Cairns-distributed electrons. The results indicate that the interplay between the debris motion and the nonthermal electron population strongly influences the properties of such structures. Our findings provide new insights into...
In the framework of the hybrid type-I + type-II seesaw mechanism, we propose a minimal and predictive texture for the Majorana neutrino mass matrix. The texture contains four free parameters that lead to intriguing correlations and yield several notable predictions, including the exclusion of the inverted hierarchy of neutrino masses, the determination of the octant of the atmospheric mixing...
Abstract: Power Line Communication (PLC) utilizes the available power lines (PLs) for various utilities, such as smart metering, control, Internet of Things (IoT) etc. [1] in places where the implementation of new wires is impossible or costly, and the use of wireless is restricted. However, the cables offer a harsh environment for data transfer characterized by high attenuation, multi-path...
Momentum-Resolved Spin Splitting in 3D Altermagnets: Interplay of Ferromagnetic and Antiferromagnetic orders
Primary author: Rotish Sarkar1
Co-author: Dr. Nimisha Raghuvanshi*1
Presenter: Rotish Sarkar
Track Classification: Track 03
1 Department of Engineering Sciences, Assam Energy Institute (RGIPT), Assam
*Corresponding Author: rotishs23ea@rgipt.ac.in
Abstract: This...
In this work, we treat black holes as bifurcation points and explore their thermodynamic phase structure using the framework of bifurcation theory which is a commonly used method from non- linear dynamics. By constructing an appropriate bifurcating function, we analyze how black holes transition between different thermodynamic phases through changes in the number and stability of fixed points....
Abstract: Atmospheric turbulence significantly influences the dynamics of the surface, lower, and upper troposphere. The refractivity turbulence structure constant (Cn2) serving as a crucial indicator for parameters such as kinetic energy dissipation rate and eddy diffusivity. In this study, continuous wind data from the Stratosphere Troposphere (ST) Radar system of Gauhati University (26.10N,...
Abstract: This paper presents a bio-inspired slotted microstrip patch antenna (MPA) designed as a dual-parameter sensor for monitoring soil moisture and water salinity. The antenna employs a radiating patch patterned with spider-web-like and circular cross-shaped slots, which enhances its sensitivity to variations in the dielectric properties of materials placed in its near field. To enable...
Abstract: The performance of silicon semiconductor based piezoresistive pressure sensors is depends on mechanical properties and electrical properties of the material, structural configuration, and doping concentration. Among different materials, polycrystalline silicon (poly-Si) has gained significant attention due to its compatibility with standard microfabrication processes,...
We study the thermodynamic phase transition of ModMax anti-de Sitter (AdS) black holes using Lyapunov exponents of massless and massive particles in unstable circular orbits. Our results demonstrate that the thermal profile of the Lyapunov exponent serves as an efficient probe of the black holeโs phase structure. We calculate the discontinuity in the Lyapunov exponent across the transition and...
In this work, we have studied the used of a thin film-based metal-semiconductor junction to improve the optical absorption, scattering and field intensities of the electromagnetic spectrum in the ultra-violate (UV) region. Nanoparticles (Nps) of copper (Cu), silver (Ag) and gold (Au) with size 14nm are individually incorporated on 5nm thick CdS thin film. The finite difference time domain...
Abstract: The sodium-to-potassium (Na+/K+) ratio serves as an important biomarker with relevance to electrolyte balance, renal health, hypertension, and metabolic and inflammatory conditions. Non-invasive body fluids offer practical routes for assessing the Naโบ/Kโบ ratio in point-of-care applications. Traditional methods for measuring Naโบ and Kโบ such as flame photometry, ion-selective...
X-ray binaries provide a powerful framework for studying accretion processes and compact objects such as neutron stars and black holes. Their flux variability, spanning time scales from milliseconds to years, reflects the complex interplay of mass transfer, disk instabilities, and emission mechanisms. We present a statistical characterization of flux variability using probability distribution...
With the advent of new physics scenarios in the neutrino sector, several models have been introduced to give an indepth view of the texture of the neutrino mass matrix. Here, we attempt to study the neutrino mass matrix considering the left-right symmetric model and its different phenomenological implications in the light of current neutrino oscillation data. The dihedral group D4 and cyclic...
Paper-based electrochemical biosensors are gaining an importance as disposable devices for ion detection in healthcare and environmental applications. Their performance depends on the combined effects of ion transport within the porous paper medium, receptor-ion interactions and electrochemical transduction at the electrode. While experimental studies provide valuable demonstrations, a clear...
In this work, five (05) samples of YBCO have been synthesized via sol-gel
technique. The samples were prepared by varying the concentrations of polyvinylpyrrolidone
(PVP), keeping all other reaction parameters constant. The synthesized samples were then
characterized by X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy
Dispersive Analysis of X-rays (EDAX), Transmission...
Abstract: We investigate the numerical convergence of Mellin moments of parton distribution functions (PDFs) when the conventional constant prefactor is replaced by sine-cosine expansions. Moments are computed for gluons and quarks using two theoretical parameter sets and compared with results from the standard parametrization. Our analysis demonstrates that trigonometric structures not only...
This study presents a time-delayed analysis of a firefly flash model derived from the bioluminescent mechanism of fireflies[1]. The model is formulated on the basis of the well-established enzymatic reactions responsible for light emission. Numerical findings are validated against experimentally reported results. Additionally, multiple peak pulses at low temperatures, including double peak...
Ag-Au bimetallic nanoparticles deposited on filter paper as a simple SERS substrate for the quantitative analysis of Carbofuran and 2,4-dinitrophenol
Primary author: Nituraj Changmai1,
Co-author: Dipjyoti Sarma2, Pabitra Nath1*
Presenter: Nituraj Changmai
1Department of Physics, Tezpur University
2Faculty of Science, Assam down town University
*Corresponding author:...
A frequency selective surface (FSS) is a thin, repetitive surface designed to reflect, transmit or absorb electromagnetic fields based on the frequency of the incoming radiation and resonant frequency of the elements. By altering the electromagnetic waves that strikes them, the frequency produce dispersive transmitted and/or reflected attributes. The desired characteristics of FSS include a...
We present a comparative analysis of Mellin moments of parton distribution functions (PDFs) using two parametrization strategies, viz. exponential-smooth polynomial weights and generalized polynomial expansions. Both approaches extend beyond the conventional constant-term model, introducing flexibility in modeling quark and gluon dynamics across the momentum fraction domain. Mellin moments are...
The observation of collective phenomena, a hallmark of the quark-gluon plasma (QGP) formed in heavy-ion collisions, in small systems like proton-proton (pp) collisions, remains a topic of intense debate. This study presents the first investigation of radial flow in high-multiplicity (HM) pp collisions using the novel transverse momentum correlation observable, $v_{0}[p_{\rm T}]$. Analogous to...
Assuming that neutrinos are Majorana particles, we have realized two-zero textures using the $\Gamma_{3}$ modular group. The $\Gamma_{3}$ modular group is a finite modular group isomorphic to the $A_{4}$ group. By assigning the matter fields of the model to irreducible representations of $A_{4}$ and choosing appropriate modular weights, we successfully construct two-zero textures of the...
Density Functional Theory (DFT) is used to investigate the optical, electrical and vibrational properties of titanium dioxide nanoparticles (TiO2 NPs) by altering the solvent conditions from DI water to ethanol. From the theoretical calculations, it was observed that their HOMO-LOMO energy gaps are comparable with the experimental results. To study the electronic properties in detail,...
Blue-emitting phosphors hold significant potential for applications in solid-state lighting. We synthesised YโOโ phosphors co-doped with 1 mol% Ceยณโบ and varying concentrations (1, 2, 3, and 4 mol%) of Euยฒโบ using the solution combustion method. Structural, compositional, optical absorption, and emission properties were investigated. X-ray diffraction analysis confirmed the formation of a cubic...
One of the unsolved problems of the Standard Model (SM) is the flavor structure of the fermions. The hierarchy in the mixing angles and masses, both in the quark and lepton sectors, can only be explained by theories beyond the SM. The Froggatt-Nielsen (FN) mechanism is one of the elegant frameworks to explain the flavor structure of quarks and neutrinos. In general, the Froggatt-Neilsen...
Abstract: This study presents the design and simulation of a Multilayer Perceptron (MLP)-based Artificial Neural Network for predicting stages of liver cirrhosis using the Cirrhosis Prediction Dataset from Kaggle. The dataset includes medical and demographic records of 418 individuals, with 20 attributes such as age, sex, treatment type, and clinical conditions (ascites, edema, hepatomegaly),...
Quantum Dots (QDs) are elite class of semiconductor nanoparticles which have potential applications in optoelectronics, photocatalytic activity and biomedical sector as they possess high fluorescent nature as well as high surface-to-volume ratio due to their atom like behaviour [1-3]. Despite having such promising ability, synthesis of these QDs adopting eco-friendly pathway is still a...
We investigate the thermodynamics of asymptotically flat black holes in four-dimensional Einstein-Gauss-Bonnet (4D-EGB) gravity using Rรฉnyi entropy as a non-extensive generalization of the Bekenstein-Hawking entropy. The resulting thermodynamic structure, formulated within a restricted phase space-like (RPST-like) framework, reveals a striking resemblance to the thermodynamics of AdS black...
We present a theoretical investigation of back-action noise cancellation in a hybrid optomechanical cavity system, equipped with a quantum well (QW) [1] and supplemented with an optical parametric amplifier (OPA). In conventional optomechanical systems, quantum back-action noise arising from radiation-pressure fluctuations imposes the standard quantum limit (SQL) on force sensitivity [2,3],...
The increasing demand for clean energy has led researchers to find alternatives for efficient energy storage solutions. While lithium-ion batteries (LIBs) are a promising technology, they face problems in terms of safety, availability, environmental impact and cost. Hence, aqueous metal ion batteries such as Na-ion, Zn-ion, Al- ion batteries are being explored. Aqueous Aluminum ion batteries...
Assuming dark matter to be asymmetric as well as self-interacting and neutrinos to be Dirac fermions, we propose a framework to address the observed baryon imbalance of the universe. We add three right-handed neutrinos $\nu_{R_i},\,{i=1,2,3}$, one singlet fermion $\chi$, a doublet fermion $\psi$, and heavy scalar doublets $\eta_i,\,{i=1,2}$ to the Standard Model. Both $\chi$ and $\psi$ are...
Microspectrophotometry (MSP), which integrates microscopic imaging with spectrophotometric analysis, is a powerful technique for concurrent morphological and spectral characterization of samples at the micron scale, supporting critical applications in biological sciences, forensic investigations, and materials research. However, the high cost and operational complexity of conventional MSP...
Kaniadakis Holographic Dark Energy extends the standard holographic dark energy (HDE) model by integrating Kaniadakis entropy, a generalization of the classical Bekenstien-Hawking entropy. Kaniadakis entropy incorporates relativistic statistical mechanics into standard HDE model and is characterized by a deformation parameter K. This study aims to construct a new form of f(R) gravity theory by...
We study a quantum particle confined to a two-dimensional parallelogram with infinite potential walls. By employing a suitable non-orthogonal coordinate system, we derive exact expressions for the energy eigenvalues and eigenfunctions. The results generalize the rectangular case and reveal how skewing the domain modifies both the spectrum and the wave functions.
