Influence of Magnesium on Mechanical Properties and Microstructure of Pure Aluminium
Authors: Vidhi A Mistry, Dr. I. B. Dave, Dr M. S. Dani, Dr V. J. Rao
Abstract
This paper deals with the influence of alloying with Magnesium of Pure Aluminium on their microstructure and Mechanical Properties. The additional level of magnesium is 2.5, 4.5, 6.5& 8.5 weight percent. The presence of Magnesium performed two types of event in liquid Aluminium. One of these is solid solution strengthening which is confirmed by the hardness & Tensile Testing. Another one is the formation of intermetallic phases like Al3Mg2 (β - Phase) by a eutectic reaction. As the amount of Mg increases Intermetallics of Al-Mg (β - Phase) is increases in developed alloy. These intermetallics are located at the grain boundary and pushed towards the grain boundary during solidification which is confirmed by Microstructural Analysis with the help of optical microscopy and Scanning electron microscopy. Grain size measurement was also carried out to understand the grain refining effect of Mg. Mg addition showed remarkable grain refinement from grain size no 1 to 6. As Magnesium content increases hardness and tensile value is increasing up to 4.5 wt% Mg after that large amount of β - Phase is formed which is brittle in nature which quite reduces hardness and tensile value.
Cybercrimes on Social Media using Machine Learning
Authors: Nikita Hire, Pallavi Patil, Prof. Bhushan Nandwalkar
Abstract
Cybercrime is a serious concern that affects teens on the internet. The number of people who use these platforms is steadily expanding. The person who uses these platforms becomes increasingly exposed to the negative effects of having an online presence as their use increases. Cybercrime is one of the biggest negative repercussions of utilising social media, among many others. It has resulted in misfortunes such as suicide and depression. People are bullied and scammed online, which has a devastating impact on their mental health. Increased knowledge and information from social media will contribute to a variety of data patterns for various types of research, such as human social behaviour, system security, sociology, and so on. Despite the fact that social media platforms were created to share information and interact with family and friends, they have also been used to promote fake news, false narratives, hate speech, and abusive communications. We presented a methodology for predicting different forms of cybercrime on social media, such as Cyberstalking, Cyberbullying, cyber hacking, cyber harassment, and cyber frauds, using data gathered from social media.
Quantum Mechanical Study of 4-Alkyl 4’-Cyano Biphenyls: Part I: C9H19-C6H5- C6H5-CN
Author: Devesh Kumar
Abstract
The quantum mechanical calcualtion werer carried out on 4-Alkyl 4’-Cyano Biphenyls (C9H19- C6H5-C6H5-CN). The IR spectra and Raman activities and its vibration association were discussed. The atomic charges with multipole moments were also computed and discussed.