63 research outputs found
Electrospun Carbon Nanofibers Encapsulated with NiCoP: A Multifunctional Electrode for Supercapattery and Oxygen Reduction, Oxygen Evolution, and Hydrogen Evolution Reactions
No full textFunctionalizing nanostructured carbon nanofibers (CNFs) with bimetallic phosphides enables the material to become an active electrode for multifunctional applications. A facile electrospinning technique is utilized for the first time to develop NiCoP nanoparticles encapsulated CNFs that are used as an energy storage system of supercapattery, and as an electrocatalyst for oxygen reduction, oxygen evolution, and hydrogen evolution reaction in KOH electrolyte. Evolving from the inclusion of bimetallic phosphide nanoparticles, the NiCoP/CNF electrode unveils superior-specific capacitance (333 Fg−1 at 2 Ag−1) and rate capability (87%). The fabricated supercapattery device offers a voltage of 1.6 V that supplies a remarkable energy density (36 Wh kg−1) along with an improved power density (4000 W kg−1) and unwavering cyclic stability (25 000 cycles). Meanwhile, the NiCoP/CNF electrode has simultaneously performed well as a multifunctional electrocatalyst for oxygen reduction reaction at a half-wave potential of 0.82 V versus reversible hydrogen electrode and can attain a current density of 10 mA cm−2 at a very low overpotential of 268 and 130 mV for the oxygen evolution reaction and hydrogen evolution reaction, respectively. Thus, the NiCoP/CNF with all its inimitable electrode properties has profoundly proved its proficiency at handling multifunctional challenges in terms of both storage and conversion. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim1
Interweaved Nickel Phosphide Sponge as an Electrode for Flexible Supercapattery and Water Splitting Applications
No full textA unique multifunctional electrode made of well-defined highly crystalline Ni-P nanoparticles interweaved apiece to form sponge-like structure prepared by the single-step hydrothermal method. The distinct phases of interlinked nanospherical Ni-P compounds (Ni 2 P, Ni 2 P/Ni 12 P 5 , and Ni 12 P 5 ) were obtained at 140 °C with different reaction time periods. The Ni 2 P exhibits supreme specific capacity of 206 mA h g -1 (1354 F g -1 ) at 5 mA cm -2 , which seems to be the highest among the Ni 2 P reported so far. Biomass-derived activated carbon was prepared as a negative electrode (135 F g -1 at 1 mA cm -2 ) to fabricate a flexible supercapattery gadget, which delivered remarkable energy density and power density of 42 W h kg -1 and 2856 W kg -1 respectively, at 3 mA cm -2 even after 10000 cycles. The Ni-P coated carbon cloth has shown immense mechanical strength and durability, which was tempting to use for electrocatalytic application. Both oxygen evolution reaction and hydrogen evolution reaction trials resulted in the evolution of an enormous amount of gas bubbles with low overpotentials of 278 and 234 mV to achieve a current density of 10 mA cm -2 , respectively. Hence, the dominant Ni-P electrodes were made multifunctional by demonstrating its potential application for efficient appliances. Copyright © 2018 American Chemical Society.1
Author details
No full textAuthor details for the article titled 'A prospective study on health-seeking behavior and post exposure prophylaxis received by animal bite victims at an anti-rabies clinic in a tertiary care center in urban Bangalore'</p
Growth and Characterization of 3D Flower-Like β-NiS on Carbon Cloth: A Dexterous and Flexible Multifunctional Electrode for Supercapattery and Water-Splitting Applications
No full textEmbodied Optimisation Tool for low-rise office buildings in steel
No full textThis thesis investigates the development and application of a computational tool that optimises the conceptual stage design of a building to have minimum embodied energy and some aspects of the operating energy, depending on the adaptability required. For this purpose, a parametric computational framework for sustainable building design was developed and implemented by the tool. The working prototype of the tool focuses on low-rise rectangular grid office buildings in steel. The various competing objectives are optimised by applying multi-objective optimisation techniques. The Embodied Optimisation Tool has been developed as a plugin within Grasshopper, for 3D modeling tool Rhinoceros, in collaboration with Arup, Bouwen Met Staal and Tata Steel.Structural DesignStructural EngineeringCivil Engineering and Geoscience
Surface Precision in Orthodontics: A Comprehensive Analysis of Interproximal Reduction Methods Using Atomic Force Microscopy
No full textBackground:
Interproximal reduction (IPR) is a common orthodontic procedure aimed at creating space between teeth for proper alignment.
Objective:
The objective of this study is to comprehensively evaluate and compare the impact of three distinct IPR methods on the surface roughness of mandibular teeth using atomic force microscopy (AFM).
Methods:
A total of 128 extracted human mandibular teeth were allocated evenly into three groups: Group A (manual IPR), Group B (rotary-disc IPR), and Group C (laser-assisted IPR). Each group underwent specific IPR procedures, and the surface roughness was evaluated using AFM. The study employed rigorous randomization and precise calibration of instruments.
Results:
The findings indicate that Group A (manual IPR) exhibited the smoothest surfaces, while Group C (laser-assisted IPR) demonstrated the highest surface roughness. Statistical analyses revealed significant differences among the groups (P < 0.05). Location-specific analysis highlighted variations across different areas of the interproximal surfaces.
Conclusion:
The choice of IPR method significantly influences the surface roughness of mandibular teeth. Manual IPR appears to yield the smoothest surfaces, while laser-assisted IPR may result in increased roughness. These findings have implications for clinical decision-making in orthodontic practices
Neural Network Based PI Controller Parameter Calculation on a Boiler Drum Level System
No full textAbstractThe controller parameters influence the performance of the closed loop system. So we have to develop a tuning method for obtaining the optimum values of the controller parameters with respect to a particular process. Controller tuning is very much process dependent and any improper selection of the controller settings may lead to instability and affect performance of the closed loop system. Closed loop tuning methods like Ziegler-Nichols method depends on estimation of ultimate gain and ultimate time period. When trying different gains on an unknown process the amplitude of undampened oscillations can become unsafe or on the conversely for low initial gain settings the test can take a long time to reach sustained oscillation condition. This paper proposes a neural network based scheme to estimate ultimate gain and optimum proportional and integral value of PI controller within affordable time limit and safe input range when the parameters change
Creating the demand for tobacco cessation - an innovative approach to attract tobacco users contemplating to quit
No full textImpact of pictorial warning and advertisement among tobacco users in India
No full textBackground
Considering the increasing burden of tobacco
related morbidity and mortality, various interventions are being formulated and
implemented frequently. Advertisement through media and pictorial warning on
tobacco products are one of the innovative interventions successfully put into
practice across various nations. Although the government of India is allocating
a significant amount to the media awareness, the efficacy of the anti-tobacco
advertisements among the tobacco users and its contribution to the area of
tobacco control has not been stated clearly. As a part of a large statewide
population based survey, the impact of the advertisements and pictorial warning
among the tobacco users were assessed and reported in this study.
Methods
A
large statewide household survey (Tamil Nadu Tobacco Survey-2016) conducted among 99,825 individuals in India
during the year 2015-2016 to monitor the tobacco usage and track the key
outcome indicators for tobacco control. Of the participants enrolled, 5208 (current
tobacco users) were asked four questions on the impact of the pictorial warning
and anti tobacco advertisement on their tobacco usage, as one of the indicator
of tobacco cessation and control.
Results
Almost 67.3% of the tobacco users reported to
have noticed the pictorial warning on the tobacco packs, of which 45.6% of them
reported that they were motivated by the warnings, to quit the usage. There is
a significant impact of the pictorial warnings on the packages in creating a
demand for tobacco cessation ( p =
0.00). Over 88.5% of the tobacco users noticed warning advertisements and
messages in various sources.
Sources of media Noticed warnings Thought of quitting TV
Films 4151 (79.7%)
1056 (20.3%) 756 (14.5%)
184 (3.5%) Newspaper 647 (12.4%) 87 (1.7%) Billboards 652 (12.5%) 90 (1.7%) Radio 425 (8.2%) 84 (1.6%)
[Table 1 Source of Adverticements] Visual media reaches a larger population and holds
a significant role in motivating the users to quit.
Conclusions
The anti tobacco advertisements and messages
through visual media is an effective method which reaches larger population and
motivates the tobacco users to reduce and quit the habit
Creating the demand for tobacco cessation - an innovative approach to attract tobacco users contemplating to quit
No full textBackground
According to GATS 2, of the 28.6% tobacco users, 55%
smokers and 50% smokeless tobacco users were contemplating to quit. Despite
taking various measures, the number of tobacco users approaching tobacco
cessation clinics is negligible in India. Moreover, the higher dropout and low quit
rate was a concern. Therefore, an innovative concept named 'Dine with a Star'
to attract the tobacco users contemplating to quit, was designed and its
outcome is presented.
Methods
A video message by three celebrities inviting tobacco
users willing to quit, to register through missed call was developed and
circulated through social media. An opportunity to dine with celebrities was
announced for those who quit. The same message was placed as hoardings in four
prominent places in Chennai city. The users who gave missed calls (n=115) were
contacted and their demographic details including tobacco usage history were
collected. A set quit date was announced and they were instructed to stay
abstained from the day. The clients were motivated through text messages and
real-time counselling over telephone, based on the need.
Results
Of the registered users, 56 (48%) had reported to have
quit. Of them, 21 (37.5%) relapsed and 35 (62.5%) had quit. The quit status was
confirmed using urine cotinine test. The successful quitters were invited to
dine with celebrities. Although, the attractive message motivated them to
register, they reported that the regular support offered over phone (self-help
tips and motivational text messages) helped to maintain their quit status.
Conclusions
This innovative cost effective approach achieved a
highest quit rate when compared to the routine behavioral and pharmacological
interventions as reported in the literature. In low resource countries like
India, considering the large number of tobacco users, innovative approaches
like this would bring results in reducing the tobacco related mortality and
morbidity
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