Novel Notch Detection Algorithm for Detection of Dicrotic Notch in PPG Signals

Photoplethysmography (PPG) is a non-invasive optical technique that measures relative blood volume changes in the blood vessels and is widely used for research and physiological studies. Dicrotic notch represent the closure of the aortic semi-lunar valve and subsequent receding blood flow when ventricles relax. Their location is used to calculate systolic time intervals and monitor cardiac function. They play a significant role in early evaluation of various diseases such as sclerosis, occlusion, arterial spasm etc. This paper proposes a novel Notch Detection Algorithm (NDA) for detection of dicrotic notches from PPG signal that are measured by non-invasive photoplethysmography sensors. The proposed algorithm is implemented with the help of self developed Graphical User Interface (GUI) in MATLAB

Photocatalytic degradation of hazardous Rhodamine B dye using sol-gel mediated ultrasonic hydrothermal synthesized of ZnO nanoparticles

The present study is focused on the sol-gel ultrasonic hydrothermal synthesis of zinc oxide (ZnO) nanoparticles and its application in the degradation of Rhodamine B (RhB) dye. ZnO nanoparticles were synthesized with varying temperatures at 90 °C, 190 °C and 550 °C. Zinc nitrate hexahydrate [Zn(NO3)2·6H2O] and potassium hydroxide were used to prepare ZnO nanoparticles and investigated using the X-ray diffraction (XRD), field emission scanning electron microscope (FESEM) and diffuse reflectance spectroscopy (DRS) for crystallinity, surface morphology, and band gap, respectively. Results obtained from XRD analysis shows that the synthesized ZnO nanoparticles are of hexagonal structure and crystalline in size ranged from the 21.1–32.41 nm. The effects of temperature show that the crystalline size of ZnO increased with increasing temperature and surface morphology investigated by FESEM. DRS used to calculate the band gap of nanoparticles shows that 3.26 eV at 90 °C, 3.25 eV at 190 °C and 3.23 eV at 550 °C. The optimal condition was determined using the response surface methodology (RSM) based Box Behnken design (BBD) method. We found that the ZnO material synthesized at 90 °C exhibits a smaller size, providing a larger surface area for photocatalytic degradation of the RhB dye. Energy is saved as it was synthesized at low temperatures. The maximum removal efficiency of Rohdamine B (RhB) dye (25 mg/L) obtained were 95% at optimized conditions i.e. pH 7, 2 g/L catalyst dose after 70 min of ultraviolet photocatalytic treatment

Temperature projections and heatwave attribution scenarios over India: A systematic review

The average global temperature is rising due to anthropogenic emissions. Hence, a systematic approach was used to examine the projected impacts of rising global temperatures on heatwaves in India and provide insights into mitigation and adaptation strategies. With over 24,000 deaths attributed to heatwaves from 1992 to 2015, there is an urgent need to understand India's vulnerabilities and prepare adaptive strategies under various emission scenarios.This situation is predicted to worsen as heatwaves become more frequent, intense, and long-lasting. Severe heatwaves can exacerbate chronic health conditions, vector-borne diseases, air pollution, droughts and other socio-economic pressures causing higher mortality and morbidity. Heatwaves with severe consequences have increased and are expected to become more frequent in Indian climatic and geographical conditions. As per the future projection studies, the temperature could rise ±1.2° C to ±3.5° C and will start reducing by the end of 2050. The study also provides data from the research that employs climatic models and statistical approaches for a more precise characterization of heat extremes and improved projections. Also, the study appraises the past, present and future heatwave trend projections. Most of these studies compute future projections using the Coupled Model Intercomparison Project (CMIP5) models and Representative Concentration Pathway (RCP). Limited systematic reports have been found using CMIP6, whereas the best-suited and widely used method was the RCP8.5. The study findings will aid in identifying the zones most susceptible to heatwave risk and provide actionable projections for policymakers to examine the existing evidence for developing proper planning and policy formulation, considering the future climate and temperature projections

Temperature projections and heatwave attribution scenarios over India: A narrative review

© 2024 Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).The average global temperature is rising due to anthropogenic emissions. Hence, a systematic approach was used to examine the projected impacts of rising global temperatures on heatwaves in India and provide insights into mitigation and adaptation strategies. With over 24,000 deaths attributed to heatwaves from 1992 to 2015, there is an urgent need to understand India's vulnerabilities and prepare adaptive strategies under various emission scenarios.This situation is predicted to worsen as heatwaves become more frequent, intense, and long-lasting. Severe heatwaves can exacerbate chronic health conditions, vector-borne diseases, air pollution, droughts and other socio-economic pressures causing higher mortality and morbidity. Heatwaves with severe consequences have increased and are expected to become more frequent in Indian climatic and geographical conditions. As per the future projection studies, the temperature could rise ±1.2° C to ±3.5° C and will start reducing by the end of 2050. The study also provides data from the research that employs climatic models and statistical approaches for a more precise characterization of heat extremes and improved projections. Also, the study appraises the past, present and future heatwave trend projections. Most of these studies compute future projections using the Coupled Model Intercomparison Project (CMIP5) models and Representative Concentration Pathway (RCP). Limited systematic reports have been found using CMIP6, whereas the best-suited and widely used method was the RCP8.5. The study findings will aid in identifying the zones most susceptible to heatwave risk and provide actionable projections for policymakers to examine the existing evidence for developing proper planning and policy formulation, considering the future climate and temperature projections.Peer reviewe

Adsorption behaviour of Chrysoidine R dye on a metal/halide-free variant of ordered mesoporous carbon (dataset)

Excel files used to prepare figures for pape

Adsorption behaviour of Chrysoidine R dye on a metal/halide-free variant of ordered mesoporous carbon (dataset)

Excel files used to prepare figures for pape