Publications by authors named "Kumar O"

The contributed absorber design in graphene addition with the displacement of three materials for resonator design in Aluminum (Al), the middle substrate position with Titanium nitride (TiN), and the ground layer deposition by Iron (Fe) respectively. For the absorption validation highlight, the best four absorption wavelengths (µm) of 0.29, 0.

View Article and Find Full Text PDF

Efficient traffic management solutions in 6G communication systems face challenges as the scale of the Internet of Things (IoT) grows. This paper aims to yield an all-inclusive framework ensuring reliable air pollution monitoring throughout smart cities, capitalizing on leading-edge techniques to encourage large coverage, high-accuracy data, and scalability. Dynamic sensors deployed to mobile ad-hoc pieces of fire networking sensors adapt to ambient changes.

View Article and Find Full Text PDF

We designed an ultra-broadband graphene absorber structure with the applied resonator design based on the Al-AlSb-Cr structure, and a thin effective layer of graphene is inserted. To develop the role of the graphene in solar absorbers, the current structure investigates above 98% for 1500 nm bandwidth and 2800 nm (overall bandwidth) for 93.68%.

View Article and Find Full Text PDF

This article presents a flexible four-element antenna for X-band applications. The proposed antenna covers the spectrum ranging from 10.6 to 11.

View Article and Find Full Text PDF
Article Synopsis
  • Plasma cell infiltration in the kidney is a rare occurrence in patients with plasma cell dyscrasia, which can lead to rapid renal failure.
  • A case study highlights a patient who experienced general weakness, anemia, and severe kidney issues, diagnosed through a kidney biopsy.
  • The biopsy results showed aggressive plasma cell activity, indicating that such kidney infiltration may signal an underlying plasma cell disorder, potentially marking a significant progression in conditions like myeloma.
View Article and Find Full Text PDF
Article Synopsis
  • - Myoglobin cast nephropathy occurs after rhabdomyolysis, leading to myoglobin release that damages kidney tubules and causes blockages.
  • - The case discussed involves a patient taking neuroleptic drugs who developed neuroleptic malignant syndrome, a serious reaction often caused by these medications.
  • - This patient also experienced acute kidney injury due to the complications from myoglobin cast nephropathy related to their condition.
View Article and Find Full Text PDF

Background: Endodontic procedures require precise manipulation and visualization to achieve optimal treatment outcomes. Magnification and enhanced visualization tools, such as dental loupes and dental operating microscopes (DOMs), have been introduced to enhance precision in endodontic practice.

Materials And Methods: Extracted human teeth with single-rooted canals were divided into two groups: a control group without magnification and an experimental group with magnification and enhanced visualization.

View Article and Find Full Text PDF

This research work presents an examination of the concentrations and modes of occurrence of environmentally sensitive elements within lignite deposits, located in Neyveli, within the Cauvery Basin of India. Coal is one of the most complex geologically formed materials, consisting of organic and inorganic matter. The inorganic mineral matter including the crystalline minerals, non-crystalline mineraloids, and elements with non-mineral associations.

View Article and Find Full Text PDF
Article Synopsis
  • Chronic kidney disease (CKD) is a global health issue, particularly concerning in Bihar, India, where it frequently coexists with conditions like type 2 diabetes, hypertension, and cardiovascular diseases, complicating patient outcomes.
  • A study involving 2,534 adult patients in Patna revealed that a significant portion of CKD patients were young males from rural areas, with hypertension and chronic tubulointerstitial nephritis being the leading causes.
  • The study identified poor management practices regarding the use of standard treatments and highlighted the pressing need for better treatment strategies to slow kidney function decline in this population.
View Article and Find Full Text PDF
Article Synopsis
  • Pigment-induced acute kidney injury (AKI) occurs when harmful pigments from myoglobin or hemoglobin cause damage to the kidneys, often linked to conditions like rhabdomyolysis or hemolysis.
  • The study reports eight cases of pigment-induced AKI, primarily from myoglobin and hemoglobin casts, triggered by factors such as intense exercise, infections, or certain medications.
  • While most patients required dialysis initially, their short-term kidney recovery was positive, highlighting the need for ongoing monitoring to check for potential long-term effects.
View Article and Find Full Text PDF

Background: There is a lack of standardized treatments for patients with less than 50% crescents observed in their renal biopsies. This study aimed to analyze the crescent percentage, clinicopathological characteristics, and renal prognosis of glomerulonephritis (GN) cases with at least one crescentic lesion.

Materials And Methods: This retrospective cohort study was conducted at the Indira Gandhi Institute of Medical Sciences, Patna, from January 2016 to December 2020.

View Article and Find Full Text PDF
Article Synopsis
  • Dyke-Davidoff-Masson syndrome (DDMS) is a rare condition in children characterized by symptoms like cerebral hemiatrophy, seizures, facial asymmetry, and hemiplegia.
  • A case study of a 15-year-old boy with DDMS showed recurrent seizures, right facial palsy, and left hemiparesis, alongside advanced renal failure.
  • Neuroimaging confirmed brain atrophy, while nephrological evaluations indicated chronic kidney disease likely due to congenital kidney issues.
View Article and Find Full Text PDF

Background: Nephrotic syndrome (NS) is characterized by various clinicopathological conditions like proteinuria, hypoalbuminemia, and anasarca. Patients with NS are prone to experience associated problems like acute kidney injury (AKI). The present study aimed to investigate the clinical profile and outcomes of NS with AKI in adults.

View Article and Find Full Text PDF

Background And Aim: Brucellosis is an infectious disease caused by species. This study aimed to identify the risk factors associated with bovine brucellosis seropositivity in organized dairy farms to control the disease in unvaccinated adult bovine herds in Karnataka, India.

Materials And Methods: In total, 3610 samples (3221 cattle and 389 buffaloes) were subjected to parallel testing using the Rose Bengal plate test and protein G-based enzyme-linked immunosorbent assay, followed by analyses of animal- and farm-level epidemiological datasets to identify the risk factors.

View Article and Find Full Text PDF

The geochemistry of fly ash produced from the combustion of coal at thermal power plants presents a significant challenge for disposal and environmental impact due to its complex mineralogical and elemental composition. The objective of this study was to investigate the mineralogical and elemental distribution of thirty lignite samples from the Barmer Basin using advanced techniques such as X-ray diffraction (XRD), X-ray fluorescence spectrometry (XRF) and inductively coupled plasma mass spectrometry (ICP-MS). XRD analysis revealed the presence of minerals such as haematite (FeO), nepheline, anhydrite, magnesite, andalusite, spinel and anatase.

View Article and Find Full Text PDF

The 5th generation (5G) network was planned to provide a fast, stable, and future-proof mobile communication network to existing society. This research presents a highly compact arc shape structure antenna resonating at 28 GHz for prospective millimeter-wave purposes in the 5G frequency spectrum. The circular monopole antenna is designed with a radius of 1.

View Article and Find Full Text PDF

A total of 38 Escherichia coli isolates were recovered from 120 samples collected from various sources of broiler chicken farms (n = 10 each) in Andhra Pradesh and Telangana states. Though the recovered E. coli isolates were found variably resistant to the tested antibiotics, all the tested isolates were susceptible to meropenem.

View Article and Find Full Text PDF

Introduction: COVID-19 in kidney transplant recipients (KTR) had been associated with high incidence of acute kidney injury and higher mortality. Management of these patients is still evolving.

Methods: A retrospective observational study was done that included all KTR aged ≥18 years and ≤65 years who had COVID-19 diagnosis via RTPCR test between 1 June 2020 and 30 May 2021.

View Article and Find Full Text PDF

Recent studies have endorsed that surface water chemical composition in the Himalayas is impacted by climate change-induced accelerated melting of glaciers. Chemical weathering dynamics in the Ladakh region is poorly understood, due to unavailability of in situ dataset. The aim of the present study is to investigate how the two distinct catchments (Lato and Stok) drive the meltwater chemistry of the Indus River and its tributary, in the Western Himalayas.

View Article and Find Full Text PDF

Aim: The aim of this current study was to compare and evaluate the reversal efficacy of Qmix and chitosan-based irrigation materials quantitatively through the assessment of the push-out bond strength of bioceramic sealer employing universal testing machine and to qualitatively analyze the sealer/dentin interface by scanning electron microscope (SEM) in the teeth subjected to fractioned radiation.

Materials And Methods: Ninety single-rooted straight human maxillary central incisors were randomly divided into six groups ( = 15) where in three groups comprise Chitosan, Qmix, and EDTA/sodium hypochlorite which were not exposed to irradiation while other three groups were challenged with irradiation protocols. Root canals were prepared with ProTaper universal system and all the samples were irrigated according to the final irrigation protocols and obturated with bioceramic sealers.

View Article and Find Full Text PDF

The coronavirus disease 2019 (COVID-19) led to a global pandemic which is still unfolding. Little is known about the presentation, course of disease, treatment, and outcome in kidney transplant recipients. In this series, we describe nine such patients who presented with COVID-19.

View Article and Find Full Text PDF

Narrowband antennas fail to radiate short pulses of nano- or picosecond length over the broader band of frequencies. Therefore, Ultrawideband (UWB) technology has gained momentum over the past couple of years as it utilizes a wide range of frequencies, typically between 3.1-10.

View Article and Find Full Text PDF

This article presents the design and analysis of a V-shaped ultrawideband (UWB) antenna and dual-band UWB notch antenna. A rectangular slot is cut into a semicircular partial ground plane of the antenna to achieve ultrawide bandwidth. A U-shape slot is etched on a V-shaped patch that radiates, and an inverted U-shape parasitic resonator is placed beside the feedline to generate dual-band notch characteristics.

View Article and Find Full Text PDF

The potential of fabricated silver and bismuth Co-N-doped imidazolate embedded into graphitic nitride BiO-Ag(0)/CN@ZIF-67 for the degradation of Methylene blue (MB) and Congo red (CR) dyes have been reported. The synthesized materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy photoluminescence (PL) spectroscopy, and electrochemical impedance spectroscopy (EIS). The band gaps of ZIF-67, CN and composites were calculated using Tauc plot.

View Article and Find Full Text PDF