This study presents an experimental investigation of wet hydrogen peroxide oxidation efficiency for the treatment of dye wastewater. In this purpose, Fe2O3/Kaolin catalyst was prepared by wet impregnation method and used for accelerating the degradation of malachite green under a wide range of critical metrics including processing temperature, catalyst dosage and hydrogen peroxide volume. The results indicate that satisfactory conversions of malachite green were atteint at high temperature levels and catalyst dosage. While the change in hydrogen peroxide volume has a dual effect on malachite green conversion, higher or lower values than 7ml can cause a negative impact on reaction performances. Therefore, the synergism of these optimized parameters has contributed to promising results, as suggested by a valuable improvement in catalyst activity which can promote 94.78% of malachite green removal rate.

[1]. Abdulah, H. I., Farhan, A. M., and Ali, A. J. 2015 Photo-synthesis of nanosized α–Fe2O3. Journal of Chemical and Pharmaceutical Research, 7(6), 588–591.
[2]. Apte, S. K., Naik, S. D., Sonawane, R. S., Kale, B. B., and Baeg, J. O. 2007 Synthesis of Nanosize-Necked Structure - and -Fe2O3 and its Photocatalytic Activity. Journal of the American Ceramic Society, 90(2), 412–414.
[3]. Benomara, A., Guenfoud, F., and Mokhtari, M. 2019 Removal of methyl violet 2B by FePO4 as photocatalyst. Reaction Kinetics, Mechanisms and Catalysis, 127(2), 1087–1099.
[4]. Fu, J. and Kyzas, G. Z. 2014 Wet air oxidation for the decolorization of dye wastewater: An overview of the last two decades. Chinese Journal of Catalysis, 35(1), 1–7.
[5]. Guerra-Que, Z., Pérez-Vidal, H., Torres-Torres, G., Arévalo-Pérez, J. C., Silahua Pavón, A. A., Cervantes-Uribe, A., Espinosa de los Monteros, A., and Lunagómez-Rocha, Ma. A. 2019 Treatment of phenol by catalytic wet air oxidation: a comparative study of copper and nickel supported on γ-alumina, ceria and γ-alumina–ceria. RSC Advances, 9(15), 8463–8479.

This study evaluates the effect of elevated temperatures on the compressive strength of fly ash blended cement concrete. The materials used for this research were ordinary Portland cement, clean river sand as fine aggregates, crushed granite chippings as coarse aggregates, potable water, fly ash and Rheobuild (a water reducing admixture). The characteristic strength of 25 N/mm2 corresponding to the mix design and a target mean crushing value of 38.12 N/mm2 were used. Fly ash was added in percentages of 0%, 5%, 10%, 15%, 20%, and 25% of ordinary Portland cement. 1.2% of Master Rheobuild ® 561M was combined to all fly ash blended mixes. Batching was done by weight.........

[1]. . "W a F R a ? M a a d Fa ". Available from https://theconstructor.org> concrete
[2]. New York City Building Code (NYCBC). "F a d k p a ": S B 702 (2014). A a ab www1.nyc.gov
[3]. Code of Practice: Structural use of Concrete, 2013.
[4]. Law , J. R., P a .L. & Da F. "M a a p p p a a xp a d p a ". Na a I S a da d & y, 6475 (2000): 1 – 8.
[5]. Indian Standard, (2003). IS 3812 -1: Specification for Pulverized fuel ash - For use as pozzolana in cement, cement mortar and concrete (CED 2: cement and Concrete).

This paper discusses a known concept, which has proven itself to be of crucial importance, as it continues to saves lives on a daily basis. This concept, is known as an airbag system. An Airbag is an automated vehicle safety restraint system for the passengers, which inflates itself upon impact, to protect the passengers. This topic involves continuous research and developments on its design, material, and performance in making this life saving safety device further efficient. However, success of any safety restraint device depends on its correct implementation and certain safety rules to be followed. Keywords; Airbags; sensors; vehicles ;restraint systems

[1]. Mastinu, Giampiero; Ploechl, Manfred, eds. (2014). Road and Off-Road Vehicle System Dynamics Handbook. CRC Press. p. 1613. ISBN 9780849333224. Retrieved 16 March 2014.
[2]. http://jlphysicsportfolio.blogspot.co.uk/
[3]. http://www.iihs.org/iihs/topics/t/airbags/topicoverview
[4]. http://www.iihs.org/iihs/sr/statusreport/article/40/7/2
[5]. https://www.google.com/patents/US2649311

There was nothing in the beginning. Nothing covered nothing. Time is a continuity of moments. Science of time is science of yoga. Yoga is derived as a sum of numbers. Sum of numbers is the frequency of numbers. Frequency as the energy density of the moments defined as the energy-mass of the moments. In the cosmos, first was the moment of space-time. Space-time energy in the vacuum (cosmic vacuum) as insta-tants. Which stabilize into soliton, a stable energy particle (self-vibrating). Two such vibrating particles form into twins of fermions and two fermions join together to become a boson (energetic photons). Similarly two bosons (energetic photons) become fermionic photons.

xxxxxxx

The abrupt occurrence and swift spread of Coronavirus-2 (SARS-CoV-2) commonly called as Coronavirus disease (COVID-19) in early 2020 snowballed the waste generation globally. The pandemic has resulted in putting tremendous pressure on already scarce resources, especially in developing countries, for waste handling and management. Though India proactively formulated new guidelines for proper and scientific management of the COVID-19 related bio-medical waste; inadequate infrastructure for waste handling & treatment and the flouting of norms by waste generation & management facilities as well as the general public engendered continuing dismal state of waste management. In order to arrest this burgeoning problem, taking stock of the current situation and improving the waste management strategy accordingly is the need of hour. In this regard, this paper aims to critically examine and present statistical analysis on several aspects related to bio-medical waste in India such as its composition, generation, treatment and disposal. The paper also peruses the current regulatory framework and potential methodologies for effectual waste reduction.

[1]. Mathur P, Patan S and Shobhawat AS, Need of biomedical waste management system in hospitals-An emerging issue-a review. Current World Environment Vol. 7, pp. 117–124, 2012.
[2]. WHO (2014) Safe management of wastes from health-care activities. A summary, The World Health Organization. Available at: https://apps.who.int/iris/bitstream/handle/10665/259491/WHO-FWC-WSH-17.05-eng.pdf
[3]. Rahman MM, Bodrud-Doza M, Griffiths MD, et al. Biomedical waste amid COVID-19: perspectives from Bangladesh. The Lancet Global Health, Vol. 8, pp. 1262, 2020.
[4]. State of India's Environment Report, 2021.
[5]. ASSOCHAM India, Unearthing the Growth Curve and Necessities of Bio-Medical Waste Management in India-2018.

The new Low Earth Orbit(LEO) satellites constellations will play a necessary role in the global connectivity ecosystem, connecting rural and remote populations, providing backhaul connectivity to mobile cellular networks, establishing communication in emergency and disaster response scenarios as well as aerial and maritime mobile users. Compared to their predecessors, the main differences of these systems are: increased performance that results from the use of digital communication payloads (such as on board processing and Intersatellite link), advanced modulation and coding schemes, multi-beam antennas, and more sophisticated frequency reuse schemes, as well as the cost reductions from modern technology and advanced manufacturing processes and reduced launch costs....

[1]. United Nations. 2020, "Policy Brief: Education during COVID-10 and beyond".
[2]. International Telecommunication Union (ITU). 2020, "Measuring Digital Development: Facts and Figures 2020".
[3]. ITU. 2020, "Connecting Humanity".
[4]. ITU and UNESCO. 2019, "The State of Broadband 2019: Broadband as a Foundation for Sustainable Development".
[5]. UNESCAP. 2019, "Satellite Communications in Pacific Island Countries".