iosr-JEEE   Volume-17 ~ Issue-2 ~ Mar. – Apr. 2022

Abstract: The world population, more than 7 billion people has faced COVD 9 which placed people in quarantine and impacted the global supply chain. Moreover, it hindered the transportation as well as stopped every type of mobile activities. The freeze in these activities also impacted the global oil market. The oil prices on 20 April 2020 dropped below zero for the first time in the history due to the access supply of crude oil. This rapid decrease in oil price resulted in anxiety among the people. Now a day's social media platform plays an impactful role and websites like Twitter can be used to share thoughts and feelings. Sentiment analysis is the process of classifying text into sentiments. The purpose of this study is to analyse the tweets gathered during 9 March 2020 to 15 May 2020. POS tagging and sentiment score of 0.1 million tweets has done using Lexicon-based approach. High level programming language, python based Natural language toolkit, is used classify the tweets. It is observed that maximum number of tweets reflective negative sentiments.

[1]. Ray, S. K., & Shaalan, K. Using Freeware Resources to Analyse Sentiments in Social Media. In Developments of E-Systems Engineering (DeSE), 2015 International Conference on (pp. 204-209). IEEE. 2015
[2]. P. Lai, "Extracting Strong Sentiment Trend from Twitter". Stanford University, 2012.
[3]. A. K. Jose, N. Bhatia, and S. Krishna, "TwitterSentimentAnalysis".NationalInstituteofTec hnologyCalicut,2010.
[4]. M.Rambocas, and J. Gama, "Marketing Research: The Role of Sentiment Analysis". The 5th SNA-KDD Workshop'11. University of Porto, 2013.
[5]. Saif, H, Y.He, and H. Alani, "Semantic Sentiment Analysisof Twitter," Proceeding of the Workshop on Information Extraction and Entity Analytics on Social Media Data. United Kingdom: Knowledge Media Institute, 2011.

Abstract: According to the classification rules followed by the Government of India, EHV (Extra High Voltage) substation refers to any substation that manages power values greater than 33 kV. The aim of this paper is to provide a comparative study of the electrical system of such EHV 132/33KV substations that are there in multiple places in India. A substation is a component of a power transmission, distribution, as well as generation system. There are various important tasks performed by substations such as the voltage is switched from higher to lower levels also vice-versa at substations. Electric power is transferred between the customer and generating station by means of a variety of substations with varying voltage levels.........

Keywords: 132/33KV, Substation, Electrical Power, Extra High Voltage.

[1]. BhagyashriPatil, SwapnilNamekar (2008). Load flow & short circuit analysis of 132/33/11KV substation using ETAP. International Journal of Applied Engineering Research. Published. [2]. Dan Zhu, "Power System Reliability Analysis with Distributed Generators", M.Sc. Thesis, Dept. Electrical Engg., Virginia Polytechnic Institute and State Univ., Blacksburg, VA, May 2003.
[3]. D. (2019, January 19). Electrical Substation Components List - Diagram, Working & Functions. WatElectrical.Com. https://www.watelectrical.com/electrical-substation-components/
[4]. E. (2013, June 15). Substation Main Functions and Classification. EEP - Electrical Engineering Portal. https://electrical-engineering-portal.com/substation-main-functions-and-classification#:%7E:text=These%20are%20also%20referred%20to,purposes%2C%20normally%20at%20415%20volts.
[5]. J.M.K.C. Donev et al. (2020). Energy Education - Electrical substation [Online]. Available: https://energyeducation.ca/encyclopedia/Electrical_substation. [Accessed: May 17, 2021].

Abstract: In the current research report, designing and simulation of a Programmable Logic Controller (PLC) and an Internet of Things (IoT)-based railway level crossing controlling and track monitoring system has been presented. As such, we need an automated system. In this paper, the main concern is to design a PLC and an IoT-based automatic interlocking system to protect trains from accidents or clashes and ensure the safety and security of the passengers. We have designed a model using LOGO software with the PLC as the main heart of the control system. The ladder logic program for PLC was developed using LOGO software on a personal computer and then downloaded into the PLC..........

Keywords: LOGO, Visual Basic, Design, Simulation, PLC, Railway Level Crossing Gate, Railway Track, Controlling and Monitoring System.

[1]. Automation Definition: https://www.merriam-webster.com/dictionary/automation/, accessed on 10 January 2022.
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[3]. Z. Li, W. Guo, and W. Wang, "The design and research based on office automation system," Journal of Physics, Conference Series, 1345(6):062027, 2019, pp. 1-4, IOP Publishing, doi:10.1088/1742-6596/1345/6/062027.
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[5]. H. M. Ahsan, "Key Safety Approaches in Bangladesh Railway," Journal of Engineering Science, p-ISSN 2075-4914, e-ISSN 2706-6835, vol. 12, no. 1, 2021, pp. 57-62, doi: https://doi.org/10.3329/jes.v12i1.53102.

Abstract: The circuit model in air of the wireless power transfer (WPT) systems is no longer applicable in seawater because of underwater eddy current loss (ECL). By analyzing the influence of seawater, it is considered that seawater mainly affects the self-inductance and mutual inductance of coils. Thus, the equivalent mutual inductance model of underwater WPT is established. It was verified by an experimental WPT system with an outer diameter of 22.5 cm and a resonant frequency of 470 kHz. The experimental results show that the output of the model is consistent with the measured results, and the model can be used to describe the underwater WPT system..

Keywords: underwater WPT system; equivalent mutual inductance; circuit model.

[1]. S. Y. Chu, X. Cui, X. Zan and A. -T. Avestruz, "Transfer-Power Measurement Using a Non-Contact Method for Fair and Accurate Metering of Wireless Power Transfer in Electric Vehicles," in IEEE Transactions on Power Electronics, vol. 37, no. 2, pp. 1244-1271, Feb. 2022, doi: 10.1109/TPEL.2021.3105689.
[2]. J. Pries, V. P. N. Galigekere, O. C. Onar and G. Su, "A 50-kW Three-Phase Wireless Power Transfer System Using Bipolar Windings and Series Resonant Networks for Rotating Magnetic Fields," in IEEE Transactions on Power Electronics, vol. 35, no. 5, pp. 4500-4517, May 2020, doi: 10.1109/TPEL.2019.2942065.
[3]. B. Luo, T. Long, L. Guo, R. Dai, R. Mai and Z. He, "Analysis and Design of Inductive and Capacitive Hybrid Wireless Power Transfer System for Railway Application," in IEEE Transactions on Industry Applications, vol. 56, no. 3, pp. 3034-3042, May-June 2020, doi: 10.1109/TIA.2020.2979110.
[4]. Y. Jiang, L. Wang, J. Fang, R. Li, R. Han and Y. Wang, "A High-Efficiency ZVS Wireless Power Transfer System for Electric Vehicle Charging WithVariable Angle Phase Shift Control," in IEEE Journal of Emerging and Selected Topics in Power Electronics, vol. 9, no. 2, pp. 2356-2372, April 2021, doi: 10.1109/JESTPE.2020.2984575.
[5]. Z. Yan, B. Song, Y. Zhang, K. Zhang, Z. Mao and Y. Hu, "A Rotation-Free Wireless Power Transfer System With Stable Output Power and Efficiency for Autonomous Underwater Vehicles," in IEEE Transactions on Power Electronics, vol. 34, no. 5, pp. 4005-4008, May 2019, doi: 10.1109/TPEL.2018.2871316..

Abstract: During making this paper, we are visiting Analyse a sensible mirror, one amongst the numerous and a sophisticated development of IoT. the main motto of this paper is to review a various number of smart mirror designs that were featured with each and each information about the end-user's health, schedules, weather, clock, news feeds. The Smart mirror greatly reduce the time and ease the lifetime of the consumer. The concept of IoT and Machine Learning with most advanced cloud technology support in developing smart devices. This technology also adds cognitive and deciding skills for all the devices, thus making it smart. But one in all the most concerns on which these smart devices witness a significant fall is on maintaining the safety and with unethical safety measures.

Keywords: IoT, LCD display, Personal assistance, Raspberry Pi, Smart mirror.

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