This paper introduces certain relations between 1-edge contraction and the total vertex stress and the confluence number of a graph. A main result states that if a graph G with ?(G) = k ? 2 has an edge vivj and a ?-set CG such that vi, vj ? CG then, ?(G/vivj) = k ? 1. In general, either S(G/ei) ? S(G/ej) or S(G/ej) ? S(G/ei) is true. This observation leads to an investigation into the question: for which edge(s) ei will S(G/ei) = max{S(G/ej): ej ? E(G)} and for which edge(s) will S(G/ej) = min{S(G/e`): e` ? E(G)}? 2024 Azarbaijan Shahid Madani University.
The world requirement for renewable energy for a sustainable future is a topic of great interest. Among such renewable energy, hydrogen is used as an energy carrier in the fuel cell. Among different fuel cell types, the high-temperature proton exchange membrane fuel cell (HT-PEMFC) has attracted many researchers due to its wide variety of applications. HT-PEMFC must be further studied to enhance its performance and durability to meet the energy requirements. In the present study, a three-dimensional non-isothermal model is developed to numerically investigate the durability and performance of a HT-PEMFC. The developed model is validated against the experimental data available in literature. A spatial characterization of CO poisoning in HT-PEMFC is carried out to investigate the spatial resolution of the polarization curves, H2 concentration, current density, and anode polarization loss. A graded cathode catalyst structure is studied to enhance the oxygen reduction reaction. The study reveals that the multiple graded CLs improve performance but leads to uneven current distribution, and high Pt loading downstream signifcantly improves uniformity in the current distribution. The study also proposes a hybrid catalyst structure to enhance performance and current distribution. The effect of various degrees of misalignment of flow feld plates and its concomitant impact with varying the clamping pressures on HT-PEMFC operation is investigated to analyze the electrochemical behavior, reactant distribution, heat transport, electric transport, and cell performance and also suggests the allowable misalignment tolerance. The proton conductivity numerical model for cage-like cross-linked membranes for enhanced proton conductivity in HT-PEMFC is developed to give a detailed and fundamental understanding of the polarization phenomena and species transport. Sensitivity analysis of operational parameters of HT-PEMFC is carried out to investigate the influential sensitivities of crucial operating parameters on evaluation index such as cell voltage, a standard deviation of current density distribution, a mean and standard deviation of overpotentials of anode and cathode at different operating current density regimes. The present research explores the possible improvement and enhancement in cell performance and uniform species distribution to enhance cell performance and durability.
Telugu film industry is one of the biggest industry in the world with its largest number of film production annually. It produces more than 300 films per year. Telugu film industry has adopted a brand new technology from Hollywood which is gaining popularity in the current promotional techniques. This new trend is called as first look Motion Poster. Motion posters are different from normal wall posters.
Puthiyathalamurai is a Tamil news channel which is of recent origin. Besides its coverage of news, this channel carries out various social developmental works. In an age when television channels mindlessly pursue after Television Rating Point (TRP) ratings pressurized by business interests and profit motives, the television channels are gradually losing their credibility. In Tamilnadu, television channels have long been the mouthpieces of politicians who own this medium. In this scenario, Puthiya Thalaimurai has taken a different path not allowing itself to be swayed by any political interest and has adopted measures to felicitate development of the society.
Wedding photography is one of the booming industry in India. Wedding photography has witnessed a great change when compared to the last decade. And on other side social media plays a vital role in all industry both to change the perception and as well boost the market for the industry. This study looks at how social media is helping to change the perception of wedding photography and as well and what are the other styles that social media users got to know.
This study deals with promotional strategies used by Electronic Dance Music (EDM) festivals like Sunburn and Supernova on social networking sites. This study also tries to learn branding techniques used by these Electronic Dance Music’s. The interest Indian youth have on music festivals has increased and is still increasing mainly due to social networking sites especially in the past few years. Promotions used by these events are trending and are the most successful promotional strategies implemented till date.
