iosr-JEEE   Volume-14 ~ Issue-1 ~ Jan-Feb 2019

Abstract: In this paper, we propose a simple and novel approach to the design of a dual axis controller for photovoltaic (PV) cells. The objective is to reduce the electronic circuitry associated with previous and existing designs while at the same time ensuring a robust principle of operation. Two pairs of Light Dependent Resistors (LDR), an ATMEGA 328P microcontroller and a servomotor form the principal components of the circuit model. The model works by performing averages of the signals generated from four (4) LDR's placed at the four corners of a photovoltaic cell. Based on the computed averages, the microcontroller relays instructions to servo motors for rotation of the PV cells towards the direction of maximum incident sun rays. All simulations were performed using the PROTEUS software. Results obtained show a 54.71% increase in the generated output power for the tracking system as opposed to the fixed solar panel. The design was successfully constructed and implemented...

Keywords: Photovoltaic, Proteus, Light Dependent Resistors, Controller

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[2]. H Arbab, B Jazi, and M Rezagholizadeh. A computer tracking system of solar dish with two-axis degree freedoms based on picture processing of bar shadow. Renewable Energy. vol.34, 2009, pp. 1114–1118.
[3]. S, Dasgupta, F W Suwandi, S K Sahoo, and Panda, S.K. Dual Axis Sun Tracking with PV Cell as the Sensor, Utilizing Hybrid Electrical Characteristics of the Cell to Determine Insolation. In Proceedings of 2010 IEEE International Conference on Sustainable Energy Technologies, 6 (9), 2010, pp. 1–5.
[4]. A Hanieh. Solar Photovoltaic Panels Tracking System. In Proceedings of the 6th WSEAS International Conference on Dynamical Systems and Control, 3 (6), 2010, pp. 30–37.
[5]. G Li, X Shi, C Fu, and G Zhou. Design and Implementation of a Novel MPPT Controller Based on Sun Tracking Technology. In Proceedings of the 11th International Conference on Electrical Machines and Systems, 17 (20), 2008, pp. 2611–2615...

Abstract: The research paper presents the development of the device and system for remote surveillance of health of Army people working in remote places. The developed System is based on Virtual Instrumentation and image processing which can monitor and detect health problems like (Heart problems, Central Nervous System abnormalities, Stress, Strain, Start/ Growth of cancer, tumour etc.) of remotely working person.The prototype system using wearable sensors, Virtual instrumentation and image processing for remote patient monitoring and virtual consultation which will be fully automatic.It detects/forecast the major abnormalities happening with the person staying in remote Places/working in border. So it will be quite useful for Arm people specially working in hilly/ dissert/ other remote areas.The device is a wireless health monitoring device which will be very useful for arm forces to diagnose physiology status (from initial stage).

[1]. Alessandro Dionisi, Daniele Marioli , "Autonomous Wearable System for Vital Signs Measurement With Energy-Harvesting Module", IEEE Transactions on Instrumentation and Measurement ,0018-9456 © 2016 IEEE.

[2]. T. F. Andrade, "Electronic Symptom Reporting Between Patient and Provider for Improved Health Care Service Quality", IEEE Xplore: 05 September 2012.

[3]. Nimal J. Kumar , "Virtual Instrumentation System With Real-Time Visual Feedback and Needle Position Warning Suitable for Ophthalmic Anesthesia Training",IEEE Transactions on Instrumentation and Measurement ( Volume: 67, Issue: 5, May 2018.
[4]. Dr. M. Karnan and T. Logesgwari, "Improved Implementation of BrainMRI image Segmentation using Ant Colony, IEEE, 2010.
[5]. AnamMustaqeem and Ali Javed, Tehseen Fatima, "An Efficient Brain Tumor Detection Algorithm Using Watershed &Thresholding Based Segmentation" I.J. Image, Graphics and Signal Processing, 2012, 10, 34-39.

Abstract: This work presents a methodology for the measurement of the main physical parameters of the subscriber digital link. For this methodology, some important procedures are indicated, such as: adequate selection of the equipment/devices for the measurements, adequate choice of the calibration process for the measurements and the accomplishment of a statistical treatment of the measured parameters: input impedance, transfer function and scatter parameter. The validation of the methodology was performed through some case studies considering two situations: one, when all the measurement procedures were performed according to the methodology and another, when the measurements did not follow the proposed procedures. In both cases cited above, the methodology proved to be quite effective and presented coherent measurements, within reliable values.

Keywords: DSL. Link Qualification. Measurement Methodology

[1]. T. Starr, J. M. Cioffi., And P.J. Silverman, "Understanding Digital Subscriber Line Technology," Upper Saddler River, NJ: Prentice Hall, 1999.

[2]. JUNIOR, E. B. Methodology for the Measurement of Parameters Related to the Qualification of the Subscriber's Digital Link, 2007. [3]. DSL. Available at: http://en.wikipedia.org/wiki/DSL. Accessed on 10/2018.

[4]. International Telecommunication Union - Telecommunication G.992.1, "Asymmetrical Digital Subscriber Line (ADSL) Transceivers", 2018.

[5]. JUNIOR. B. Edson, L. V. Souza, Castro L. S. Agostinho, et al. "A Methodology for Measurements of Basic Parameters in a xDSL System ", Broadband Access Communication Technologies, SPIE Vol. 6390 63900M-1, October, 2006..