312 research outputs found
New Lignocellulosic Aristida adscensionis Fibers as Novel Reinforcement for Composite Materials: Extraction, Characterization and Weibull Distribution Analysis
No full textIn this research, the Aristida adscensionis fibers (AAFs) were taken out from the plants and its fundamental properties anlayzed for the first time. The AAFs were characterized and compared with other natural fibers by the use of physico-chemical analysis and various characterization techniques such as FT-IR, XRD, NMR, TGA, SEM and AFM. Chemical analysis showed that A. adscensionis fibers have a high cellulose content of 70.78% whereas the contents of lignin and wax are equal to 8.91% and 2.26%, respectively. The FT-IR, XRD and NMR analysis confirmed that AAFs are rich in cellulose content with CI and CS equal to 58.9% and 11.5 nm, respectively. Pycnometer analysis allowed to estimate a density of 790 kg/m3. The TGA revealed that these fibers are thermally stable up to 250 °C while SEM and AFM analysis evidenced that the fiber surface was rough. The fiber diameter and tensile properties was analysed by Weibull distribution. The characterization results and Weibull distribution analysis for the A. adscensionis fibers are an agreement with other natural fibers reported in literature. So this new lignocellulosic material is suitable as reinforcing phase in composites for potential engineering semi-structural applications like roofing sheets, bricks, door panels, furniture panels, interior paneling, storage tanks, pipelines, etc
An exploration of fractal-based prognostic model and comparative analysis for second wave of COVID-19 diffusion
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No full textAgamic literatures symbolize temples as medical centers. Agama texts are expounded by God Himself, who is considered to be farthest extreme of knowledge and wisdom. They pave ways for the ennoblement of mankind through physical and mental purification. Religious doctrines such as Agamas are guidance for external and internal refinement in order to achieve the objective of life. A human being is tormented by various ailments of the body and mind in his numerous births. Temples are construed to be relief centers to appease the ailments in life of a human being. Hence they are built. Right from the Agamic architecture, layout , spatial arrangement and rituals of worship the entire gamut of the eco-system of a temples act as a respite to the sufferings undergone by human beings by and large, has been illustrated in this article with relevant examples. The illustrations elucidate the role of Agamic temples as Medical Centers. This elucidation paves way for understanding or at least create an inquisitiveness amongst the readers to understand the significance of visiting temples for worship
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No full textThe Hindu Religious Movement in Malaysia has been a major contributor to the development of Hinduism by nurturing and protecting the Hindu religion. The purpose of this article is to explain how Hindu religious movements evolved before liberation and how its formation contributed to the growth of Hinduism and the religious awareness of the Hindus. This article is about to describe the historical evidence for the appearance of Hinduism in Malaya, what is the contribution of Hindus background in continues growth of Indian movements, how was the connections made among the religious movements in India and religious Movements in Malaysia, how the educated Hindus started these religions movements and the period in which they started. This article also discusses how the Hindu Religions created a new look after the Japanese period and the major religious movements that participated in it. This article is based on a qualitative review protocol and defined in the view of religious sociology. This article has been written based on the research library examining only the Hindu movements recorded during the Malay rule. This article will not only look at the history of Hindu religious movements that appeared before the liberation of Malaya but also the purposes they were created. This article also explains what the conditions were like for these developments and what implications they had
Dynamic Simulation and Validation of a Vent and Safety Valve for Cryogenic Flight Tanks
No full textAbstractHigh Thrust Cryogenic Rocket Stages entail the use of a Vent and Relief Valve which can cater to a higher discharge rate. The Vent function is called for during ground servicing operations like tank chilling and pressurant replenishment and during flight to take care of the decrease in ambient pressure and boil-off losses. The Relief function acts as a redundant feature to protect the tanks from catastrophic failure due to structural damage caused by over-pressurization. Nevertheless, this valve needs to be characterized for both these functions during ground tests. This paper describes the modelling of and experimentation on an Inverted Type Pilot Operated Vent and Safety Valve. A mathematical model for simulating the dynamic behavior of this tank-mounted valve is developed. For this, a set of non-linear, first order, coupled ordinary differential equations, based on laws of conservation of mass and energy, are derived using fixed control volume approach. The numerical solution of these equations is obtained using fourth order Runge-Kutta method. The pressure, temperature, flow rate, seat stress and lift thus obtained are plotted to find the characteristic parameters such as cracking pressure, full flow pressure, reseal pressure, opening and closing response, tank pressure decay rate and full flow rate. The valve performance is studied for the effect of main valve outlet orifice and the pilot valve outlet orifice using these simulations. These results are validated by comparing it to the test results
Luminescence Enhancement Induced by Aggregation of Alkoxy-Bridged Rhenium(I) Molecular Rectangles
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Unprecedented reduction of 2,2-bipyrimidine in a one-pot synthesis of neutral rhenium(I)-based molecular rectangles
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