Gagan Kumar
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View article: Terahertz multiband notch filter based on a dielectric topological valley photonic crystal
Terahertz multiband notch filter based on a dielectric topological valley photonic crystal Open
This study presents the design of a terahertz multiband notch filter based on a dielectric topological valley photonic crystal (VPC) using a cavity-integrated Mach–Zehnder interferometer geometry. The filter exploits valley-protected edge …
View article: Probing Beam Coherence via Terahertz Metasurface
Probing Beam Coherence via Terahertz Metasurface Open
Motivated by the recent advancements in terahertz metaoptics, this study demonstrates a metasurface exhibiting distinct optical characteristics with coherent and incoherent illuminations at terahertz (THz) frequencies. Traditionally, perio…
View article: Probing Beam Coherence via Terahertz Metasurface
Probing Beam Coherence via Terahertz Metasurface Open
Motivated by the recent advancements in terahertz metaoptics, this study demonstrates a metasurface exhibiting distinct optical characteristics with coherent and incoherent illuminations at terahertz (THz) frequencies. Traditionally, perio…
View article: Ultra-broadband actively tunable terahertz modulator based on multi-stacked metamaterial
Ultra-broadband actively tunable terahertz modulator based on multi-stacked metamaterial Open
View article: Twitter Sentiment Analysis Using Machine Learning Techniques
Twitter Sentiment Analysis Using Machine Learning Techniques Open
This paper presents an effective sentiment analysis system designed to classify the polarity of tweets into positive, negative, or neutral sentiments. The framework utilizes supervised machine learning algorithms, including Logistic Regres…
View article: Application of Nanotechnology in Agriculture: Opportunities and Challenges in the Context of Environmental Sustainability
Application of Nanotechnology in Agriculture: Opportunities and Challenges in the Context of Environmental Sustainability Open
Nanotechnology is an emerging field with immense potential to revolutionize agriculture by enhancing productivity, resource efficiency, and sustainability. Its applications span diverse areas, including nano-fertilizers for improved nutrie…
View article: Asymmetry-Driven Terahertz Quasi-Bound State in Continuum Excitation in Complementary Metamolecule
Asymmetry-Driven Terahertz Quasi-Bound State in Continuum Excitation in Complementary Metamolecule Open
View article: Bound State in Continuum Assisted Polarization-Independent Electromagnetically Induced Transparency in a Terahertz Metamolecule
Bound State in Continuum Assisted Polarization-Independent Electromagnetically Induced Transparency in a Terahertz Metamolecule Open
View article: Antenna Optimization Using Metamaterials
Antenna Optimization Using Metamaterials Open
Metamaterials are artificial structures engineered to exhibit electromagnetic properties not found in natural materials. These materials offer a diverse range of characteristics, including negative refractive index, reverse radiation, and …
View article: Sustainable Livestock Management Practices: Balancing Productivity and Environmental Health
Sustainable Livestock Management Practices: Balancing Productivity and Environmental Health Open
Sustainable livestock management is crucial for ensuring food security, economic viability, and environmental health. The increasing demand for livestock products has intensified the need for practices that enhance productivity while minim…
View article: High-quality factor Quasi-BIC mode via selective symmetry-breaking approach in a terahertz metasurface
High-quality factor Quasi-BIC mode via selective symmetry-breaking approach in a terahertz metasurface Open
This study numerically and experimentally presents a novel approach to excite bound state in the continuum (BIC) mode with a high Q-factor in the THz meta-molecule (composition of meta-atoms) system, leveraging a unique method of selective…
View article: Multi-stacked polarization insensitive broadband terahertz metamaterial
Multi-stacked polarization insensitive broadband terahertz metamaterial Open
In this article, we present a polarization-insensitive terahertz metamaterial designed by stacking resonators capable of providing ultra-wideband terahertz transmissions. Our design includes a square ring resonator situated between two win…
View article: Terahertz binary computing in a coupled toroidal metasurface
Terahertz binary computing in a coupled toroidal metasurface Open
The applications of terahertz metamaterials are being actively explored in recent times for applications in high-speed communication devices, miniature photonic circuits, and bio-chemical devices because of their wide advantages. The toroi…
View article: Single and Dual-Band Electromagnetically Induced Transparency in a Strongly Near Field Coupled Planar Toroidal Terahertz Metamaterial
Single and Dual-Band Electromagnetically Induced Transparency in a Strongly Near Field Coupled Planar Toroidal Terahertz Metamaterial Open
View article: Strong transient magnetic fields induced by THz-driven plasmons in graphene disks
Strong transient magnetic fields induced by THz-driven plasmons in graphene disks Open
Strong circularly polarized excitation opens up the possibility to generate and control effective magnetic fields in solid state systems, e.g., via the optical inverse Faraday effect or the phonon inverse Faraday effect. While these effect…
View article: Electromagnetically induced transparency in a strongly coupled orthogonal polarization-insensitive planar terahertz metamaterial
Electromagnetically induced transparency in a strongly coupled orthogonal polarization-insensitive planar terahertz metamaterial Open
We demonstrate experimentally and numerically the electromagnetically induced transparency (EIT) effect in a strongly coupled planar terahertz (THz) metamaterial. The circular-shaped four-arc geometry combined with cross resonators ensures…
View article: Terahertz Logic Gate Operations in a Toroidal Metasurface
Terahertz Logic Gate Operations in a Toroidal Metasurface Open
The applications of terahertz metamaterials are being actively explored in recent times for applications in high-speed communication devices, miniature photonic circuits, and bio-chemical devices because of their wide advantages. The toroi…
View article: Strong transient magnetic fields induced by THz-driven plasmons in graphene disks
Strong transient magnetic fields induced by THz-driven plasmons in graphene disks Open
Strong circularly polarized excitation opens up the possibility to generate and control effective magnetic fields in solid state systems, e.g., via the optical inverse Faraday effect or the phonon inverse Faraday effect. While these effect…
View article: Polarization independent lattice-coupled terahertz toroidal excitation
Polarization independent lattice-coupled terahertz toroidal excitation Open
The toroidal dipole excitation is important for metamaterial research because of its low-loss attribute. In this study, we demonstrate numerically and experimentally, a unique toroidal metasurface that modulates a broad resonance into a sh…
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Content Open
View article: B-34 | Elective or Non-Elective Left Atrial Appendage Occlusion Predicts In-Hospital Mortality: Analysis from the National Inpatient Sample Database (2016-2018)
B-34 | Elective or Non-Elective Left Atrial Appendage Occlusion Predicts In-Hospital Mortality: Analysis from the National Inpatient Sample Database (2016-2018) Open
The most common arrhythmia worldwide is atrial fibrillation, and management includes oral anticoagulation to prevent stroke. However, many patients are not candidates for anticoagulation due to comorbidities. Left atrial appendage occlusio…
View article: Polarization independent lattice-coupled terahertz toroidal excitations
Polarization independent lattice-coupled terahertz toroidal excitations Open
The toroidal dipole excitation is an important field for metamaterial research because of their low-loss attribute. In this study, we demonstrate numerically and experimentally, a unique polarization independent terahertz metamaterial that…
View article: All-Dielectric Asymmetric Planar Metasurface Based Dual-Parametric Sensor
All-Dielectric Asymmetric Planar Metasurface Based Dual-Parametric Sensor Open
View article: Systematic Literature Review in Software Test Data Generation
Systematic Literature Review in Software Test Data Generation Open
In software development, software testing is an important practice which comprises of different activities. It is the time consuming and cost oriented process. In testing, it is very important to select test data generation process wisely …
View article: Hybrid Approach for Automated Test Data Generation
Hybrid Approach for Automated Test Data Generation Open
Software testing has long been thought to be a good technique to improve the software quality and reliability. Path testing is the most reliable software testing technique and the key method for improving software quality among all testing…
View article: Automatic Test Data Generation for Basis Path Testing
Automatic Test Data Generation for Basis Path Testing Open
Objectives: This paper presents a new hybrid ACO-NSA algorithm for the automatic test data generation problem with path coverage as an objective function. Method: In it, at the first instance, test data (d…
View article: A NOVEL APPROACH FOR TEST DATA GENERATION
A NOVEL APPROACH FOR TEST DATA GENERATION Open
Software testing is an essential phase in software design process, accounting for more than half of the total cost due to its rigorous and time-consuming nature. Path test data generation is the most important stage in software testing, an…
View article: Finding Feature Selection for Business Dataset using PCA on Big Data Environment using Spark
Finding Feature Selection for Business Dataset using PCA on Big Data Environment using Spark Open
Business is important in development of any country as it contributes into the country’s GDP. India has 29% of GDP and 28% of employment. Its nominal output ranks 16th in the world and the service industry ranks 15th. This project is examp…
View article: Plasmonic Terahertz Nonlinearity in Graphene Disks
Plasmonic Terahertz Nonlinearity in Graphene Disks Open
View article: Adoption of integrated plant protection practices by sugarcane (Saccharum officinarum L.) growers in West Champaran, Bihar
Adoption of integrated plant protection practices by sugarcane (Saccharum officinarum L.) growers in West Champaran, Bihar Open