iosr-JEEE   Volume-16 ~ Issue-6 ~ Nov. – Dec. 2021

Abstract: Healthcare is a field with outstandingly developed technology and requires constant improvement and quality improvement in all aspects, especially in the field of cardiology. The application of electrical engineering, sensors and microprocessors has long been widely applied and strongly developed in advanced countries. The bracelet model that supports heart patients is also a typical example of applying sensor measurement and data processing techniques to the medical field. Simply put, the medical staff or directly the patients will be measured heart rate and then from the data displayed and the warnings given will have a specific treatment method. With a shortened design and leading equipment, this product promises to be of great help to heart disease patients.

Keywords: Bracelet, Smart bracelet, Aduino.

[1]. Sensory Engineering Textbook – Vu Quang Hoi, Vietnam Education Publishing House, 2010.
[2]. Textbook of C programming techniques, Science and Technology Publishing House in 2003.
[3]. C++ textbook, Pham Hong Thai, Science and Technology Publishing House in 2011

Abstract: This article derives a simple linear model for semiconductor bandgap variation with high temperature. The model is based on the theorem of equipartition of energy for the electrons and holes at thermal equilibrium which gives the average kinetic energy of an electron or hole to be 3/2(kT). The calculated bandgaps at temperatures of 100K to 600K of Silicon matches with the observed experimental values to within ±1%. The model is applicable to bandgaps of all covalently bonded semiconductors at high temperatures and is possibly valid for the electron work functions of metals and the oxide/semiconductor band offsets as well......

Keywords: Bandgap, Semiconductors, Silicon, Silicon Carbide, Temperature

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Abstract: Airborne transmission of respiratory viruses can cause pandemics. To understand the effectiveness of using ultraviolet (UV) C-band light for indoor air disinfection, we analyze UV light dose delivery to air and other fluids in conduit disinfectors. Analytical dose equations are derived respectively for a circular non-reflective conduit enclosing a linear UV light source and a square reflective conduit with a directional UV light source. It is found that the fluid UV absorption coefficient  plays an important role in determining the UV light distribution for efficient dose delivery. For opaque fluids of  larger than 0.03 cm-1, distributed instead of concentrated UV light can deliver dose more efficiently.......

Keywords: Air disinfection, COVID-19, ultraviolet light, UVC LEDs, SARS-CoV-2.

[1]. Zhang R., Li Y., Zhang A., Wang Y., and Molina M. Identifying airborne transmission as the dominant route for the spread of COVID-19. Proc. Natl. Acad. Sci. U.S.A. 117, 14857-14863 (2020). https://doi.org/10.1073/pnas.2009637117
[2]. Minamikawa T., Koma T., Suzuki A., Mizuno T., Nagamatsu K., Arimochi H., Tsuchiya K., Matsuoka K., Yasui T., Yasutomo K., and Nomaguchi M. Quantitative evaluation of SARS‑CoV‑2 inactivation using a deep ultraviolet light‑emitting diode. Scientific Reports 11, 5070 (2021). https://doi.org/10.1038/s41598-021-84592-0
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[5]. Zhang J. P., Hu X., Bilenko Y., Deng J., Lunev A., Shur M. S., Gaska R., Shatalov M., Yang J., and Khan M. A. AlGaN-based 280nm light-emitting diodes with continuous-wave power exceeding 1mW at 25mA. Appl. Phys. Lett. 85, 5532 (2004). https://doi.org/10.1063/1.1831557

Abstract: The Brushless DC (BLDC) motors are one of the most intriguing motors, not only because of their efficiency and torque characteristics, but also because they have the benefits of being powered by direct current (DC), while avoiding the drawbacks of brush or the conventional DC motors. A BLDC motor has excellent speed to torque characteristics, as well as high dynamic responsiveness, high efficiency, long life, and noiseless operation. This research paper includes a simulation for closed loop speed control of BLDC motor, the design and implementation of Particle Swarm Optimization (PSO) tuned PID controller for speed control of Brushless DC (BLDC) motor. The simulation is done by using MATLAB software.

Keywords: PSO algorithm, BLDC motor, MATLAB, Simulink, PID Controller.

[1]. Rajesh Kumar, CH.Vishnu Chakravarthi, S.Anuradha, B. Puroshatham Prakash and D.Rama Krishna , "Advanced Speed Control Strategies of PMBLDC Motor In Simulation Environment", Journal of Science and Technology (JST), Vol. 3, Issue 3, pp 13--23, March 2018.
[2]. Ayam M, Liqaa S.M and Raoof T.H, "Speed Control For Separately Excited DC Motor With PID Controller, GA and PSO", International Journal of Scientific Research (IJRSR), Vol. 7, Issue 7, pp 12673- 12678, July 2016.
[3]. A.K. V Jha, V.K.Verma, P. Prince, B. Priyadarshini and R. K. Ranjan, "PSO Based Design of current CCII-PID Controller for the Speed Control of BLDC Motor"International Conference on Power System",Chennai,pp245—248,February2018
[4]. Sharad p. Jadhav and Sushant N. Pawar "Design and Implementation of PSO tuned PID control for speed control of PMDC motor" International conference of Emerging Technology(INCET)2020.
[5]. Prasad, P. V. N.; Rajkumar, A. D. (2006): Modeling and simulation of sensor less control of PMBLDC motor using zero-crossing back EMF detection. IEEE International Symposium on Power Electronics, Electric Drives, Automation and Motion

Abstract: A simplified understanding of a charged metal-oxide-semiconductor (MOS) device is developed by a relook at the derivation of the average oxide fields in the device. The distortion in the oxide field due to charges is removed by subtracting and adding the flatband voltage from the applied voltage to make the field at the cathode and anode uniform as before without charges

Keywords: Metal-Oxide-Semiconductor, Anode, Cathode

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Abstract: ATCs' who serve in the tower and technicians in the powerhouse only control ON/OFF Rotating Beacon. It is difficult to know if there is damage to the lights and drive motor Rotating Beacon. This study aims to determine how to design a Prototype Rotating Beacon using NodeMCU and PZEM sensors and how the tools can monitor current and voltage Rotating Beacon using Blynk applications in the smartphone. This study began with designing the tool and testing the tool. This circuit is designed for technicians to monitor rotating beacons. In this circuit's design, monitoring this failure detection uses NodeMCU Microcontroller media equipped with PZEM-004t sensor.

Keywords: Airfield Lighting System; Rotating Beacon; NodeMCU, PZEM-004t

[1]. AR, C. 2020, Get to know Blynk Platform IoT, Installation and Application. Retrieved from Complete Arduino IoT Beginner Tutorial: https://www.anakkendali.com/mengenal-blynk-platform-iot-instalasi. [2]. Bumiller, G., and Pirschel, N. 2003, Airfield ground lighting automation system realized with power line communication. In Proc. 8th Int. Symp. Power Line Commun. Appl (pp. 16-20).
[3]. Cahyanti, Dwi and Ubaya, Huda and Exaudi, Kemahyanto. 2020, Monitoring of The Use of Electrical Energy in IoT-Based Rooms. Diploma thesis, Sriwijaya University.
[4]. Dewanata, P., Fibriani, I., Suko Saewono, C. 2014, Study Banding Communication Instrument Landing System With Airfield Lighting System At Bali Ngurah Rai Airport. Scientific Articles of Student Research Results. Department of Electrical, Faculty of Engineering, University of Jember Jln. Kalimantan 37, Jember 68121. E-mail: dewanatapandu074@gmail.com.
[5]. Dwi Agustini, E. 2012. The need for Approach Light System on both runway thresholds of Sultan Hasanuddin-Makassar Airport to Increase Aircraft Movement Capacity. Researchers at the Center for Air Research and Development. e-mail: litbang_udara@yahoo.co.id.

Abstract: Most of the reported work in the literature on energy resource allocation planning for rural areas uses optimisation algorithms, of which the most widely used is the Linear Programming (LP) approach. However, it is felt that improved results can be obtained when the linear form used in LP is solved using nonlinear algorithms. This paper has attempted to investigate three nonlinear algorithms to solve the energy allocation problem for a rural microgrid concerning the LP algorithm solution. The proposed nonlinear algorithms are the Simulated Annealing......

Keywords: Comparative evaluation, Linear Programming, Nonlinear programming algorithms, Optimisation methods, Rural energy allocation

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