This work will present one of the application of internet of things (IoT) that is Office automation. The objective of this paper is to control independent Office electrical appliances through internet based remote system. From anywhere, any place where there is internet connectivity, it can change the state of those electrical appliances either in on state or off state. The controlling circuit is built around Node Mcu ESP8266 and any android phone for controlling the appliances. In addition to the mobile phone, controlling can also be done through web dashboard from laptop or desktop. Any four GPIO pins are selected from the node mcu to control four specific applications such as corridor light, main door locking system, running the motor for overhead tank and fan.

[1]. Belgi Y.G.1, Avatade P.G.2, Deshmukh P.V.3, Sakhare A.M.4, Shinde A.J.5 and Prof. Patil J.M.6 "Android Based Appliances Control System" International Journal of Emerging Technology and Advanced Engineering. Vol 3, issue 12, pp. 681-683, Dec 2013.
[2]. Abu Farzan Mitul1, Fida Hasan Md Rafi1, Md. Manirul Islam1, Mohiuddin Ahmad1. International Conference on Electrical, Computer and Telecommunication Engineering, pp. 511-514, 01- 02 December 2012 (ICECTE2012), RUET, Rajshahi-6204, Bangladesh.
[3]. Santosh.M.Nejakar "Wireless Infrared Remote Controller for Multiple Home Appliances" International Journal of Electrical and Electronics Research. Vol. 2, Issue 1, pp. 25-35, Month January-March 2014.
[4]. Sindhuja Alla, B.Kiran Babu "Remote Control of Electrical Appliance using Wireless Technology GSM" International Journal of Science and Research. Volume 2 Issue 4, pp. 498-500, April 2013.
[5]. Mohd Helmy Abd Wahab, Norzilawati Abdullah, Ayob Johari, Herdawatie Abdul Kadir "GSM Based Electrical Control System for Smart Home Application" Journal of Convergence Information Technology Volume 5, Number 1, pp. 33-39 February 2010.

Design of the aerated basins in wastewater treatment includes the mass balance based biokinetic simulations, hydrodynamic calculations utilising computational fluid dynamics as well as mechanical simulation through fluid–structure interactions. Computational fluid dynamic simulation is able to resolve the flow field more accurately, producing information on velocity and pressure field within the reactor. The Reynolds Averaged Navier-Stokes formulation of momentum equation with turbulence closure equations are solved numerically with finite volume method. By knowing the flow field, the force acting on surfaces of matters could be calculated and this force as an exterior source term (or in other words, boundary condition) could be the initial setup for a stress simulation for the element. Submerged beams are applied in attached growth............

[1]. Samstag, R. W., et al. CFD for wastewater treatment: an overview. Water Science and Technology, 2016, vol. 74, no 3, p. 549-563. [2]. Peng, Si Mai, et al. The Application of computational fluid dynamics (CFD) in wastewater biological treatment field. Applied Mechanics and Materials, 2014, vol. 507, p. 711-715. [3]. Dettmer, Wulf G.; Peric, Djordje. On the coupling between fluid flow and mesh motion in the modelling of fluid–structure interaction. Computational Mechanics, 2008, vol. 43, no 1, p. 81-90.
[4]. Metcalf and Eddy.Wastewater engineering: treatment and reuse, 2003, McGraw-Hill.
[5]. Kárpáti Á., Latest results in wastewater treatment, development and simulation, Case studies 11 (In Hungarian), 2005, Veszprém, Hungary.

This project presents Hand Gesture recognition for Indian sign languages. The gesture recognition basically is designed for human machine interaction. The system consists of components such as pre-processors, feature extraction& recognition for static gesture recognition. In the first component background subtraction& detection of hand is obtained. Depth camera is used to extract the hand gesture recognition. In second component features such as contour & convex are computed & gesture is recognized for sign languages identifiably. The features of hand are extracted and the static hand posture is classified using the support vector machine (SVM). The result of convexity shows that there white regions which...........

[1]. Ankit Chaudhary, J. L. Raheja, Karen Das, Sonia Raheja, "Intelligent Approaches to interact with Machines using Hand Gesture Recognition in Natural Way: A Survey", International Journal of Computer Science & Engineering Survey (IJCSES) Vol.2, No.1, Feb 2011
[2]. Raheja J.L., Shyam R,. Kumar U., Prasad P.B., "Real-Time Robotic Hand Control using Hand Gesture", 2nd international conference on Machine Learning and Computing, 9-11 Feb, 2010, Bangalore, India, pp. 12-16
[3]. M. M. Hasan & P. K. Mishra, (2011) "Performance Evaluation of Modified Segmentation on Multi Block for Gesture Recognition System", International Journal of Signal Processing, Image Processing and Pattern Recognition, Vol. 4, No. 4, pp 17-28.
[4]. M. M. Hasan, & P. K. Mishra, (2012) "Improving Morphology Operation for 2D Hole Filling Algorithm", International Journal of Image Processing (IJIP), Vol. 6, No. 1, pp. 635-646.

The fishery sectors in Indonesia have enormous potential including capture fishery potential of US$ 15.1 billion/year, marine aquaculture potential of US$ 46.7 billion/year, and aquaculture potential of US$ 10 billion/year. With abundant marine natural resources, the development program of Indonesia should notice the increasing number and quality of fishing vessels. A good fishing vessel design has to consider the aspects of efficiency, feasibility standards, and fishermen's safety. To achieve feasibility and safety standards, the design process has to concern the characteristics of the waters where the fishing vessel operates. The Southern Java waters are waters that have high waves with Hs ranging between 1.5............

[1]. Bai, Y. & Jin, W. L. (2016). Marine Structural Design, 2nd Ed. Chapter 5 Wave Loads for Ship Design and Classification, Butterworth – Heinemann: Elsevier.
[2]. Basir, N. B., Trimulyono, A., Santosa, A. W. B. (2015). The Analysis of Chine Effect on the Resistance of Fishing Vessel Catamaran Type (in Indonesian language). In Jurnal Teknik Perkapalan, Vol. 3(2), pp. 183-192.
[3]. Bhattacharyya, R. (1978). Dynamics Of Marine Vehicles, New York : John Wiley & Sons.
[4]. Chakrabarti, S. K. (2005). Handbook of Engineering, Vol. 2. Offshore Structure Analysis Inc. Illinois, USA : Elsevier.
[5]. Djatmiko, E. B. (2012). Behavior and Operability of Offshore Platforms on Random Waves (in Indonesian language), Surabaya : ITS-Press.

The massive increase in energy demand, the deficiency of natural resources, and the recent world awareness of improving environmental conditions are the master reason behind the utilization of Renewable Energy Resources (RERs). Optimizing RERs in Hybrid Energy Systems (HESs) is a multiobjective problem considering economic, technical, and environmental issues. This paper develops a procedure to optimize the solution of standalone or grid-connected HESs. The formulations of the objective function, unit, and system constraints are clarified. For verification, the procedure is applied to a selected irrigation project in Upper Egypt by implementing HOMER software to optimize the RERs for reliable and economical feeding HES. Groups of irrigation, domestic, and welding loads are considered in the study as built in the project.............

[1]. M. Katsivelakis, D. Bargiotas, A. Daskalopulu, I. P. Panapakidis, L. Tsoukalas, Techno-Economic Analysis of a Standalone Hybrid System: Application in Donoussa Island, Greece, Energies, 14, (2021) 1868. [2]. J. Ahmed, K. Harijan, P. H. Shaikh, A. A. Lashari, Techno-economic Feasibility Analysis of an Off-grid Hybrid Renewable Energy System for Rural Electrification, Journal of Electrical and Electronic Engineering, 9; 1 (2021) 7-15. [3]. S.M. Shaahid, Review of research on autonomous wind farms and solar parks and their feasibility for commercial loads in hot regions, Renew. Sust. Energ. Rev. 15; 8 (2011) 3877-3887. [4]. A. Acakpovi, E.B. Hagan, F.X. Fifatin, Cost Optimization of an Electrical Energy Supply from a Hybrid Solar, Wind and Hydropower Plant, Int. J. Comput. Appl. 114; 19 (2015) 44-51. [5]. M.A. Hessami, Designing a hybrid wind and solar energy supply system for a rural residential building, Int. J. Low-Carbon Tec. 1;2 (2006) 112-126.

Riccati equation is a non-linear ordinary differential equation of first order. It is used in different areas in Mathematics like theory of conformal mapping, algebraic geometry and also in Physics. This equation can be solved by converting it first into Bernoulli equation and then into linear differential equation. Lie symmetry method is one of those methods which are used to find general solution of differential equations of any order by finding lie symmetries as solutions of Lie Invariance condition. In this paper, this method is used to solve Riccati equation. The method is explained with the help of examples.

[1]. Bluman G., Invariant solutions for ordinary differential equations. SIAM J. Appl. Math., 1990. Vol. 50, No. 6:p.1706-1715.
[2]. Dresner, L., Similarity solutions of nonlinear partial differential equations invariant to a family of affine groups. Mathematical and Computer Modelling, 1988. Vol 11:p.531-534.
[3]. Gazizov, R. K., & Ibragimov, N. H., Lie symmetry analysis of differential equations in finance, Nonlinear Dynamics, 1998. Vol 17(4): p. 387-407.
[4]. Hu Y. and Du X., The First Integrals of a Second Order Ordinary Differential Equation and Application. Asian Journal of Research in Computer Science, 2019. Vol 3(3): p.1-15.
[5]. Kumar G., On lie symmetry solution of first order homogeneous ordinary differential equation, International Journal of Applied Research, 2019. Vol 5(12): p. 428-430.

This paper presents a 3-leg full-bridge resonant inverter configuration for different material vessel induction cooking application. The proposed 3-leg full-bridge resonant inverter configuration features simultaneous heating of three different material vessels, and independent output power control of each load. In this proposed configuration, three different induction heating loads are simultaneously operated at their 1.05 times of respective resonant frequencies to achieve ZVS. Iron, steel, and aluminum material vessels are used as induction loads. The output powers are independently controlled by using an asymmetric duty cycle control technique. The proposed 3-leg full-bridge resonant inverter configuration is designed and simulated in MATLAB / Simulink.

[1] W. C. Moreland, "The induction range: Its performance and its development problems," IEEE Trans. Industry Applications, vol. IA-9, no. 1, 1973, pp. 81–85.
[2] Masaki Miyamae, Takahiro Ito, Kouki Matsuse, Masayoshi Tsukahara, "Performance of a High Frequency Quasi-Resonant Inverter with Variable-Frequency Output for Induction Heating", IEEE 7th International Power Electronics and Motion Control Conference, Harbin, China, 2012.
[3] Mokhtar Kamli, Shigehiro Yamamoto, and Minoru Abe, "A 50-150 kHz Half-Bridge Inverter for Induction Heating Applications," IEEE Trans. Industrial Electronics, vol. 43, no.1, 1996, pp. 163–172.
[4] S.M.W. Ahmed, M.M. Eissa, M. Edress, T.S. Abdel-Hameed, , "Experimental investigation of full bridge Series Resonant Inverters for Induction-Heating Cooking Appliances", 4th IEEE Conference on Industrial Electronics and Applications, ICIEA 2009, pp.3327-3332..
[5] Atsushi Okuno, Hitoshi Kawano, Junming Sun, Manabu Kurokawa, Akira Kojina, Mutsuo Nakaoka, "Feasible Development of Soft-Switched SIT Inverter with Load-Adaptive Frequency-Tracking Control Scheme for Induction Heating," IEEE Trans. Industry Applications, vol. 34, no. 4, 1998, pp. 713 - 718.

This paper presents design and control aspects related to dual frequency full-bridge inverter are used for induction gear hardening application. Single dual frequency full-bridge inverter configuration for dual frequency operation is considered. Zero voltage switching aspects related to this configuration are explained. Performance of this proposed inverter configuration is presented with simulation waveforms in MATLAB/Simulink.

[1] Wolfgang R. Schwenk, "Simultaneous dual-frequency induction hardening", Heat Treating Progress, Volume 3, pp. 35-38, April 2003.
[2] Fabio Biasutti, Christian Krause and Sergio Lupi, "Induction hardening of complex geometry and geared parts", Heat Processing 3-2012, pp. 60-70.
[3] Electroheat Technologies, "Simultaneous dual-frequency gear hardening" [Online]. Available: http://www.electroheat-technologies.com/SDF%20Article. pdf
[4] Wolfgang Schwenk and Hans-Joachim Peter, "Surface hardening using the simultaneous dual frequency method", Metallurgia, March 2003, pp. 8-9.
[5] Valery Rudnev, " Induction Hardening of gears and critical components Part II", Gear Technology, Nov/Dec 2008, pp 47-53.