32 hasil untuk "G. Ramkumar"

Protective interphases and safety enhancement in high-energy-density batteries: A critical review

G. Ramkumar

Results in Engineering, Vol. 32 · 2026 · Inggris · DOAJ Scopus

High-energy-density rechargeable batteries are indispensable for electric vehicles, grid-scale energy storage, and portable electronics; however, their commercialization is constrained by interfacial instability, degradation, and safety concerns. Protective interphases, particularly the solid…

Weakly θ-I-Closed Sets and Weakly θ-I-continuous functions with respect to an Ideal Topological Spaces

M Vijayasankari; G Ramkumar

Ratio Mathematica, Vol. 45 No. 0 · 2023 · Inggris · DOAJ

In this paper, we introduce \breve{\theta}-\mathcal{I}-closed sets, \breve{\theta}-\mathcal{I}-closed sets, \breve{\theta}-\mathcal{I}-continuous functions and \breve{\theta}-\mathcal{I}-continuous functions and investigate their properties and its characterizations. After that we introduce…

Some New θ-I-Locally Closed sets with Respect to an Ideal Topological Spaces

M Vijayasankari; G Ramkumar

Ratio Mathematica, Vol. 45 No. 0 · 2023 · Inggris · DOAJ

In this paper, we introduce the new notions called \breve{\mathbit{\theta}}-\mathbf{I}-locally closed sets, \breve{\mathbit{\theta}}-\mathbf{I}-locally closed sets and \breve{\mathbit{\theta}}-\mathbf{I}-closed functions and investigated their properties and also we have studied their relations to…

Tidal wind oscillations in the tropical lower atmosphere as observed by Indian MST Radar

M. N. Sasi; G. Ramkumar; V. Deepa

Annales Geophysicae, Vol. 19 · 2001 · Inggris · DOAJ Scopus

Diurnal tidal components in horizontal winds measured by MST radar in the troposphere and lower stratosphere over a tropical station Gadanki (13.5° N, 79.2° E) are presented for the autumn equinox, winter, vernal equinox and summer seasons. For this purpose radar data obtained over many diurnal…

Observational evidence for the generation of a 4-day oscillation in the low-latitude middle atmosphere associated with an anomalous stratospheric cooling

V. Deepa; G. Ramkumar; K. K. Kumar

Annales Geophysicae, Vol. 25 · 2007 · Inggris · DOAJ Scopus

Altitude profiles of temperature in the stratosphere and lower mesosphere over Gadanki (13.5° N, 79.2° E), based on lidar observations during the Equatorial Wave Study campaign (29 February–2 April 2000), showed an anomalous cooling of the stratosphere, lasting for about 4–5 days. Immediately…

Gall stone ileus with cholecystoduodenal fistula

Elangkumaran Vellode Manoharan; P Kanakarajan; G Ramkumar dkk.

Apollo Medicine, Vol. 16 No. 3 · 2019 · Inggris · DOAJ

Gallstone ileus and cholecystoduodenal fistula are rare and life-threatening conditions which are due to cholelithiasis and recurrent attacks of cholecystitis. It predominantly affects female population. The signs and symptoms are non-specific, sometimes only established during surgery. Prompt…

First simultaneous lidar observations of sodium layers and VHF radar observations of E-region field-aligned irregularities at the low-latitude station Gadanki

S. Sridharan; A. K. Patra; N. Venkateswara Rao dkk.

Annales Geophysicae, Vol. 27 · 2009 · Inggris · DOAJ Scopus

Simultaneous observations of atmospheric sodium (Na) made by a resonance lidar and E-region field-aligned-irregularities (FAI) made by the Indian MST radar, both located at Gadanki (13.5° N, 79.2° E) and horizontal winds acquired by a SKiYMET meteor radar at Trivandrum (8.5° N, 77° E) are used to…

Agenesis of Urinary Bladder with Solitary Kidney, Ectopic Ureter, and Unicornuate Uterus in an Adult Patient

S. M. Gowtham; M. Kiran; G. Ramkumar dkk.

Journal of Gastrointestinal and Abdominal Radiology, Vol. 02 No. 02 · 2019 · Inggris · DOAJ

A Stability Indicating RP-HPLC Method for the Estimation of Gemcitabine HCl in Injectable Dosage forms

Shaik Mastanamma; G. Ramkumar; D. Anantha Kumar dkk.

E-Journal of Chemistry, Vol. 7 No. S1 · 2010 · Inggris · DOAJ

A stability indicating RP HPLC method has been developed for the determination of gemcitabine hydrochloride. Chromatography was carried out on an ODS C18 column (250×4.6 mm; 5μ) using a mixture of methanol and phosphate buffer (40: 60 v/v ) as the mobile phase at a flow rate of 1.0 mL/min. The…

Assessment of Dental Arch Width in Individuals With Various Growth Patterns: A Cross-Sectional Study

Subramanian, Madhumitha; U B, Rajasekaran; Prabu, Neetika dkk.

Cureus · 2025 · Inggris · PubMed Central

Background: Dental arch width plays a vital role in orthodontic diagnosis, treatment planning, and post-treatment stability. Various skeletal growth patterns, hypodivergent, normodivergent, and hyperdivergent, are known to influence craniofacial morphology and dental arch dimensions. However…

Advance on the biology, behaviour ecology and management of the coffee white stem borer, Xylotrechus quadripes Chevrolat, 1863 (Coleoptera: Cerambycidae)

B. Kariyanna; Zhicheng Xiong; Nidagundi Pradnyarani dkk.

Heliyon, Vol. 9 No. 9 · 2023 · Inggris · DOAJ Scopus

The coffee white stem borer, Xylotrechus quadripes Chevrolat, 1863 (Coleoptera: Cerambycidae) – here removed from the synonymy with X. javanicus (Laporte & Gory, 1841) – is the most notorious pest in Arabica coffee plantations in many southeast Asian countries. It can cause damage up to 80% in…

First results from the CAWSES-India Tidal Campaign

S. Gurubaran; D. Narayana Rao; G. Ramkumar dkk.

Annales Geophysicae, Vol. 26 · 2008 · Inggris · DOAJ Scopus

The first CAWSES-India Tidal Campaign was conducted by the Indian scientific community during March–April 2006. The objectives of this campaign were: (1) To determine the characteristics of tides in the troposphere and lower stratosphere (0–20 km) and mesosphere and lower thermosphere (MLT) region…

Artificial Intelligence to Analyze the Performance of the Ceramic-Coated Diesel Engine Using Digital Filter Optimization

P. Nirmala; G. Ramkumar; Satyajeet Sahoo dkk.

Advances in Materials Science and Engineering, Vol. 2021 · 2021 · Inggris · DOAJ Scopus

The completeness of oil goods activates the barriers of lack of goods, inequality in the society, and surroundings impoverishment. Avoiding their use overnight and switching to clean electric motors are a challenge. Under all these conditions, researchers can launch their research on alternative…

Investigation of Groundwater Hydro-Geochemistry, Excellence, and Anthropoid Wellbeing Hazard in Dry Zones Using the Chemometric Method

Mohamed Saad Ahmed; G. Ramkumar; S. Radjarejesri dkk.

Advances in Materials Science and Engineering, Vol. 2022 · 2022 · Inggris · DOAJ Scopus

This work deals with the groundwater hydro-geochemistry, intake and irrigation water quality, and noncarcinogenic human healthiness concerns in a dry environment. Water quality characteristics were measured in samples which were gathered from the countryside and city. The findings showed that the…

Simulation Process of Injection Molding and Optimization for Automobile Instrument Parameter in Embedded System

S. Ramesh; P. Nirmala; G. Ramkumar dkk.

Advances in Materials Science and Engineering, Vol. 2021 · 2021 · Inggris · DOAJ Scopus

The automobile instrument is the indispensable item that is essential to keep the driver conversant of the process of the engineer and the other system. There are different parameters involved in the automobile instrument, which requires a different process involved in creating the automobile…

Implementation of Solar Heat Energy and Adsorption Cooling Mechanism for Milk Pasteurization Application

G. Ramkumar; B. Arthi; S. D. Sundarsingh Jebaseelan dkk.

Adsorption Science & Technology, Vol. 2022 · 2022 · Inggris · DOAJ Scopus

The use of renewable energy is crucial to the global growth of sustainability. Milk business amongst many other food industry divisions requires a significant amount of energy, making the meal processing business one of the most energy-intensive industries. As of right now, more than 30 percent of…

Study of ureteral and renal morphometry on the outcome of ureterorenoscopic lithotripsy: The critical role of maximum ureteral wall thickness at the site of ureteral stone impaction

Amit Kumar Mishra; Santosh Kumar; Lalgudi Narayan Dorairajan dkk.

Urology Annals, Vol. 12 No. 3 · 2020 · Inggris · DOAJ Scopus

Purpose: The purpose is to study the association of stone, ureteral, and renal morphometric parameters with the relevant outcome variables, i.e., complication rate, stone-free rate (SFR), and operating time of ureterorenoscopic lithotripsy. Although a safe procedure, it still occasionally has major…

A Short-Term Solar Photovoltaic Power Optimized Prediction Interval Model Based on FOS-ELM Algorithm

G. Ramkumar; Satyajeet Sahoo; T. M. Amirthalakshmi dkk.

International Journal of Photoenergy, Vol. 2021 · 2021 · Inggris · DOAJ Scopus

Solar energy conversion efficiency has improved by the advancement technology of photovoltaic (PV) and the involvement of administrations worldwide. However, environmental conditions influence PV power output, resulting in randomness and intermittency. These characteristics may be harmful to the…

Estimation of Groundwater Quality in Arid Region or Semiarid Region by Using Statistical Methods and Geographical Information System Technique

Ahmed A. S. Alothman; Mohamed Saad Ahmed; S. Radjarejesri dkk.

International Journal of Photoenergy, Vol. 2022 · 2022 · Inggris · DOAJ Scopus

This study takes place in year of 2021 during the premonsoon and postmonsoon seasons and twenty water samples were collected. Chemical factors like chloride, fluoride, sulphate, nitrate, and phosphate were measured in water samples. There is a significant difference in anion dominance between pre-…

Preparation of Polymeric Nanomaterials Using Emulsion Polymerization

Satyajeet Sahoo; Anitha Gopalan; S. Ramesh dkk.

Advances in Materials Science and Engineering, Vol. 2021 · 2021 · Inggris · DOAJ Scopus

Nanoparticles are said to be active particles which are entrapped in the surface of the polymeric core. Since nanoparticles were used in medical and biotechnological fields, there is a great demand in the preparation of nanoparticles. Nanoparticles are prepared from different substances; mainly…