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Your search keyword '"Ram, G."' showing total 109 results
Start Over Author "Ram, G." Publication Type Conference Materials
109 results on '"Ram, G."'

1. Influence of cobalt ions on spectroscopic and emission characteristics of lead aluminia bismuth phosphate glass system.

Author

Ram, G. Chinna, Kumar, A. Suneel, Narendrudu, T., Suresh, S., and Rao, D. Krishna

Subjects
ION emission, LEAD, OPTICAL spectra, LIGHT absorption, ABSORPTION spectra, PHOSPHATE glass, LEAD oxides
Abstract

By using the conventional melt quenching method, PbO−Al2O3−Bi2O3−P2O5 glasses doped with varying concentration of CoO were prepared and characterized. The optical absorption spectra of the glasses exhibited two principal absorption bands, one at 572 nm and the second one consisting of multiplets with the meta centre around1487 nm ascribed to the tetrahedrally coordinated Co2+ ions. Besides these, the spectra also exhibited two feeble bands around 532 and 633 nm which are the characteristics of octahedral coordinated Co2+ and Co3+ ions respectively. Photoluminescence spectra of the titled glasses have exhibited two emission bands at 640 and 868 nm due to tetrahedral Co2+ ions. FTIR spectra of the samples exhibited various vibrational bands due to phosphate, bismuth, PbO4, PbO6, AlO6, AlO4 and CoIII-O vibrational units. The studies on the titled glasses have revealed that tetrahedrally coordinated Co2+ ions are found to increase as the content of CoO is gradually increased up to 0.8 mol%. As a result the degree of depolymerization of the glass network decreases which in turn enhances its rigidity with increasing the concentration of CoO upto 0.8mol%. [ABSTRACT FROM AUTHOR]

Published
2025
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2. Design and analysis of paper-based microfluidic channel to detect potassium concentration in human sweat.

Author

Ram, G. Dinesh, Kumar, S. Praveen, Srinivasan, T. K., Ramya, S., and Lingaraja, D.

Subjects
PORE size distribution, POTASSIUM channels, PARAFFIN wax, FILTER paper, MICROFLUIDIC analytical techniques, PERSPIRATION
Abstract

This paper describes an idea of a simple analytical microfluidics device that is used to infer levels of potassium concentration in a sample. The project is based on a paper-based device with capable barriers and a 50 mm microchannel which is subjected to wick the solution containing potassium salts. The wicking rate and the wicking time is calculated. The barrier is made out of cheap processes by using paraffin wax which is heated to 70 oC for about 10 minutes and then carefully applied and infused into the filter paper for required length. Various simulations are carried out and studies were analysed by using COMSOL Multiphysics to understand the wicking phenomenon and the impact of filter paper parameters such as porosity, pore size and pore distribution index on wicking rate. The dimensions of the microstrip is inferred from the simulation results and the designed strip is tested with KOH solution of closely varying concentrations. A common time is set and the wicking rate and fluid uptake is observed. It is realised that the output shows that wicking rate is inversely proportional to the concentration of solution. [ABSTRACT FROM AUTHOR]

Published
2025
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10. Speech emotion recognition: Develop a system that uses AI to recognize emotions from images or live video feeds. You can use machine learning models like CNNs to classify facial expressions.

Author

Ram, G. Sri Eswara Sai, Gunasekaran, M., Selvaperumal, Sathish Kumar, and Venu, Durumutla

Subjects
CONVOLUTIONAL neural networks, AFFECTIVE computing, DECISION trees, OLDER people, EMOTION recognition
Abstract

The research project aims to assess and contrast the predictive accuracy of two distinct machine learning algorithms: the Decision Tree Classifier (DTC) and a Convolutional Neural Network (CNN) integrated with Innovative Geometric Transformation. This investigation focuses on evaluating the capability of these algorithms to predict the risk of falling among elderly individuals who are grappling with various health concerns. This research study uses a dataset with different poses adjusted as classes and trains two machine learning algorithms, a Decision Tree Classifier and a Convolutional Neural Network, with a new geometric transformation. A sample size calculation is performed with a G- power pretest of 80%, a threshold of 0.05%, and a CI of 95%. Each algorithm has a sample size of 20. The Convolutional Neural Network with Novel Geometric Transformation obtained 82.60% of accuracy whereas the Decision Tree Classifier which has got 68.85% of accuracy. The statistical significance value between CNN and DTC based on the sample t-test is p=0.000 (p<0.05) two-tailed, this shows that there is significance between two groups. Based on the experiments and results, the Convolutional Neural Network with Novel Geometric Transformation approach obtained better accuracy for predicting fall risk in older adults than the Decision Tree Classifier model. [ABSTRACT FROM AUTHOR]

Published
2024
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15. Electrophoretic separation of platelets using cross flow microfluidic channel for clinical assays.

Author

Lingaraja, D., Praveen Kumar, S., Raguraman, J., Ramya, S., and Dinesh Ram, G.

Subjects
CHANNEL flow, ELECTRO-osmosis, MICROFLUIDIC devices, ELECTRIC potential, CELL separation, ELECTROPHORESIS, ELECTROPHORETIC deposition, BLOOD platelets
Abstract

Microfluidic devices build benefits such as capacity to manipulate 10-9 to 10-18 L sample volume, fast analysis and on-spot detection are required for separation and analysis of biomolecules for earlier clinical assays. This paper presents the electrophoresis based separation of platelets from whole blood for the early diagnosis of illness such as thrombocytophenia and thrombocytosis. Simple cross flow microfluidic channel, utilizing focusing and filtration channels, is designed for separation based on electrophoresis and electro-osmosis principle. Blood and analyte solution is introduced into the device using the capillary forceand the separation is achieved by applying the electric potential. The concentration of different molecules along the channels is analyzed for the designed structure. [ABSTRACT FROM AUTHOR]

Published
2024
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