iosr-JEEE   Volume-17 ~ Issue-1 ~ Jan. – Feb. 2022

Abstract: Accompany wide area communication has become an intelligent technology, which makes the real-time interaction between the substations and the wide area protection and control system possible. However, the present protection and control system to handle this real-time data has been recognized to be deficient. In this paper begins by reviewing the development history of power system protection, with special attention paid to the recent development in the field of wide-area and integrated protections, in order to look into the future development of protection and control systems. New technique for power system protection and control is proposed. Then the concept of integrated wide area protection and control is introduced, where it can be shown that a hierarchical protection and control system provides the protection and control for wide area or regional power substations/plants and their associated power networks.......

[1]. Chen, R.Z., Wu, W.C., Sun, H.B., Zhang, & B.M. (2013). A two-level online parameter identification approach. In: IEEE Power & Energy Society General Meeting. Vancouver.
[2]. Liu, M.C., Zhang, B.M., Yao, L.Z., et al. (2008). PMU based voltage stability analysis for the transmission corridor. In: IEEE The 3rd Int. Conf. on Electric Utility Deregulation and Restricting and Power Technologies. Nanjing.
[3]. He, J. B., Lu, C., Wu, X. C., et al. (2007). Design and experiment of heuristic adaptive HVDC supplementary damping controller based on online Prony analysis. In Proc. IEEE Power Engineering Society General Meeting.
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Abstract: The power sector in Nigeria and other developing countries is under severe stress because of generation supply deficits and high fuel costs. The electricity supply–demand gap in most developing countries is increasing rapidly as a result of the fast growing demand for electricity to meet economic growth, increasing urbanization, generation capacity deficits, high costs of new generation capacity, and fuel supply issues. From a menu of demand-side energy-efficiency measures, energy-efficient lighting technologies offer one of the most promising solutions to help bridge the supply-demand gap in many developing countries. The incandescent lamps have been found to consume much energy compared to fluorescence bulbs. Recently attention has shifted to Light Emitting Diodes (LED) for their advantage of using small electrical energy to deliver luminous lights. As enormous as the advantages of LED bulbs are over......

Key Words: Light, LED, efficiency, heat, sink, pin, trapezium, fin

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[3]. Cho Y. H., Kim H. W., Lee J. M, and Kim M. S (2015). A new approach to the design of a low Si-added Al–Si casting alloy for optimizing thermal conductivity and fluidity. Journal of Materials Science; Volume 50, Issue 22; p. 7271.
[4]. Fengze H., Daoguo Y and Guoqi Z (2011). Thermal analysis of LED lighting system with different fin heat sinks. Journal of Semiconductors; Vol. 32, No. 1; p. 014006-1
[5]. Li-Ming Chu, Wei-Chin Chang and Ting Hsuan Huang (2015). A Novel Heat Sink Design and Prototyping for LED Desk LampsHindawi Publishing Corporation Mathematical Problems in Engineering Article ID 765969; p 1.

Abstract: This paper is a response to the paper by De, Biswas, and Roy that was published in Fuzzy Sets and Systems, 2001, 209-213. They considered an application of intuitionistic fuzzy sets in medical diagnosis. We point out that their approach contains questionable results that may lead to false diagnoses of patients' symptoms. Consequently, we advise researchers and physicians not to apply their approach to avoid risk to human life. Based on the similarity of pattern recognition, we provide a new approach to recognize the pattern of patients that will help physicians to determine the preliminary check for further laboratory examination in medical diagnosis.

Key Words: Pattern recognition; Fuzzy set; Intuitionistic fuzzy set (IFS); Medical diagnosis; Intuitionistic fuzzy relation (IFR)

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[3]. P.R. Innocent, R.I. John, Computer aided fuzzy medical diagnosis, Information Sciences 162 (2004) 81104.
[4]. J. Palma, J.M. Juarez, M. Campos, R. Marin, Fuzzy theory approach for temporal model-based diagnosis: An application to medical domains, Artificial Intelligence in Medicine 38 (2006) 197218.
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Abstract: The primary medium access control (MAC) technique of 802.11 (Wireless Local Area Networks) is called distributed coordination function (DCF). DCF is a carrier sense multiple access with collision avoidance (CSMA/CA) scheme with binary exponential backoff (BEB), where a node increases its contention window CW upon every packet collision. The performance of an IEEE 802.11 network depends on the operation of this backoff mechanism.......

Key Words: 802.11; DCF; CSMA/CA; Contention Window; Backoff; Throughput; RTS/CTS.

[1]. Alberto Leon-Garcia & Indra Widjaja, Communication Networks: Fundamental Concepts and Key Architectures, Second Edition.
[2]. James F. Kurose & Keith W. Ross, Computer Networking, A Top-Down Approach, Fifth Edition.
[3]. Giuseppe Bianchi, "Performance analysis of the IEEE 802.11 distributed coordination function", IEEE Journal on Selected Areas in Communications VOL. 18, NO. 3, MARCH 2000.

Abstract: High speed Induction Motor with sleeve bearings are more prone to axial vibrations due to its weak magnetic centering forces. It results in axial movement, and rotor drifts "to and fro" from magnetic center positions. It also causes severe hunting. There are several reasons which are responsible for axial vibrations, among them actual cause is been identified, rectified and results obtained are satisfactory is presented in this research paper..

Key Words:Axial Vibration, Magnetic Centre, Sleeve Bearing, Hunting, High Speed Induction Motor

[1]. Chuck Yung. "Axial Hunting Of 2-Pole Motors: Causes & Cures," published by Electrical Apparatus Service Association (EASA), May 2005.
[2]. Michael J. Costello. "Understanding the Vibration Forces in Induction Motors," proceedings of the 19th turbomachinery symposium.
[3]. Dan Patterson. "Vibration Analysis of Motors in Service center," published by Electrical Apparatus Service Association (EASA), March 2007.
[4]. Katalin Agoston. "Fault Detection of the Electrical Motors Based on Vibration Analysis," proceedings ELSEVIER, October 2014.
[5]. Rajendra Mistry, William R Finley & Scott Kreitzer. "Induction Motor Vibrations," proceedings IEEE industry application magazine, November 2010.

Abstract: The aim of this paper is design a data acquisition system (SCADA) to power distribution electrical network which supply the power from a vicinity Distribution Network Operator (DNO) 132KV overhead line through one underground cable terminated to one of the 132KV lattice towers to an industrial state. (It should be mentioned that feeding this high-profile industrial state by one underground cable does not comply firm capacity). The design starts from 132/11KV substation and continues to entire 11KV network up to each factory containing the 400V main circuit breaker on the LV side of the transformer.....

Key Words: SCADA system, Distribution Network Operator, Circuit breaker and Transformer

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Abstract: The number of connected devices and services continues to grow. The very cheap price of sensors is supercharging the expansion of the Internet of Things. Many sectors are making increasing use of this technology, including healthcare, construction, agriculture, and transportation. Concerns about the Internet of Things' future development center on security and privacy issues. Most Internet-connected "things" are very basic devices with limited hardware capabilities, making it extremely difficult to secure them using conventional methods. In this chapter, we'll go over why it's crucial to protect IoT networks, what problems arise when trying to do so, and what solutions have been proposed elsewhere.

Key Words: Internet of Things (IoT); security; privacy; IoT architecture

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[5]. Jee Young Lee, Jungwoo Lee, "Current Research Trends in IoT Security: A Systematic Mapping Study", Mobile Information Systems, vol. 2021, Article ID 8847099, 25 pages, 2021. https://doi.org/10.1155/2021/8847099