IJET Vol. 8, Issue 1, March 2023
Bu koleksiyon için kalıcı URI
Güncel Gönderiler
Öğe Improvement of Cluster Head Selection in LEACH for Reducing Energy Consumption in Wireless Sensor Networks(İstanbul Gelişim Üniversitesi / Istanbul Gelisim University, 2023) Alrubaye, Ali Qasim; Myderrizi, IndritSensor nodes (motes) are randomly dispersed in wireless sensor network (WSN) domains. Motes in WSNs coordinate for producing information of high quality and each scattered mote routes that information back to fixed or mobile base stations (BSs). One of the problems with sensor nodes is battery constraints that limit network lifetime, meaning mots contain limited power depending on size, battery life, and memory. Aggregation-based routing algorithm, low energy adaptive clustering hierarchy (LEACH), is envisaged as a highly adequate solution to reduce power consumption. The main objective of this work is to optimize the LEACH protocol primarily in terms of power consumption. There are two reasons to explore hierarchical routing. First, sensor networks have high density and there is a large amount of redundancy in communication. The second is to increase the scalability of the sensor network by considering the security aspects of the communication. In many studies using the LEACH algorithm, the performance analysis of WSNs with the MATLAB simulator has revealed some flaws that need to be eliminated in the algorithm. The proposed research uses the improved IV-LEACH protocol to ensure an even distribution of selected cluster heads of motes over the network to increase the efficiency of the LEACH protocol. Using MATLAB, average life, energy consumption, and efficiency are analyzed to determine mots suitability for use in WSNs. The IV-LEACH protocol outperforms the LEACH protocol, improving energy consumption, lifetime and throughput in a simulated network of 150 nodes.Öğe Shaping Effects on Long Span Bridge Deck Aerodynamics(İstanbul Gelişim Üniversitesi / Istanbul Gelisim University, 2023) Etemadi, AliAn aerodynamic circumstance of wind pressure surrounding the long-span bridge allocates many theoretical and experimental research to this topic. Determination of the materials and optimal cross-sectional shape of bridge decks that affected a dynamic behavior of long span bridge deck is still included in current research issues and works to be continued in this path. These include the Lack of sufficient awareness of wind forces, stemming from complex nature, and the unpredictability of the wind nature. In this study, in addition to recognizing the aerodynamic behavior of the flutter, the acting pressure forces on the bridge deck are investigated. The geometrical shape of decks, wind velocity, and flutter conditions are adopted as design variables that affected the dynamic forces exerted on bridge decks. A common type of geometric sections of the long-span bridge deck and effective aerodynamic phenomena are examined. The hollow box steel suspended deck and double cells box girder linked via upper flanges and cells linked via the top and bottom flanges are adopted for Computational Fluid Dynamic (CFD) approach. Thus, aerodynamic instability and turbulent torsional flutter flows, as well as a trail of shedding vortices around the bridge decks, are investigated. By changing some geometrical parameters of commonly used bridge sections, the optimal cross-section in terms of turbulence created above and below the deck section is examined and an optimal cross-sectional shape variable is proposed. The shape variable and section dimensions adopted for CFD-Simulations are similar to the dimensions and materials used in previous laboratory specimens of wind tunnels to be able to interpret the results and possibly verify them with the result of the current study.Öğe Parameter Optimization of Bidirectional ThreePhase DC-AC Power Inverter by an Improved Particle Swarm Optimization based Fractional Order PI Controller for the Grid Forming Operation(İstanbul Gelişim Üniversitesi / Istanbul Gelisim University, 2023) Çelebi, Mehmed; Başçi, AbdullahNowadays, it is becoming more remarkable for bidirectional power conversion from battery energy sources. These structures can be used for three-phase loads and they also have a common application in Micro-grid systems. This paper is mainly focused on parameter optimization of the system by using improved particle swarm optimization (PSO) in grid forming operation of dual active bridge series resonant converter (DABSRC) topology, in term of total harmonic distortion (THD). Fractional order proportional integral (FOPI) controller is used to simulate DABSRC regarding to THD factor in this system. The results are also compared to genetic algorithm (GA) and conventional PSO. While all algorithms achieved the same optimum control parameters, a significant reduction of computation time has been reported by improved PSO in terms of THD.Öğe A Mathematical Model to Evaluate the Impact of Yoga Poses on Body(İstanbul Gelişim Üniversitesi / Istanbul Gelisim University, 2023) Norozpour, SajedehDaily Yoga activities are part of a ten-posture series with linked relaxation and aerobic exercise, resulting in a balancing of flexibility and extensions. Because this series is often repeated and advocated by several yoga professionals, structural modeling to justify its purported health advantages is needed. Older is recommended to do more workouts to maintain activity, given the increasing pressures in societal, economical, and health issues as a result of the elderly society. They are, regrettably, unable to do so due to a variety of physical and psychological obstacles. The whole body form changes significantly as people get older, and sag. One of the most important variables in regaining their drive and comfort throughout social activities might be the layout of their apparel. The impact of athletics on older is investigated in this study. Depending on rigid body movements and free-body diagrams, a numerical model is built for each position in the yoga exercises. The idea of static equilibrium is used to calculate the forces and moments that different joints experience. The model given in this study was developed under a variety of assumptions. But what is discovered in practice is that the knees carry the maximum joint action while the ankle and wrist are discovered to play a major part in transferring the ground response forces throughout yoga. Thus, it would imply that the model is a good tool for forecasting the forces and durations that happen not just during the yoga positions but also during other situations.Öğe Finite Element Analysis for the Static Response of Functionally Graded Porous Sandwich Beams(İstanbul Gelişim Üniversitesi / Istanbul Gelisim University, 2023) Al-itbi, Sura Kareem Abbas; Noori, Ahmad ReshadIn this paper, the finite element method is used to analyze the static response of the functionally graded porous (FGP) sandwich beams subjected to uniformly distributed loads along the beam span. The core of the beam is made up of functionally graded porous material while the top and bottom layers are made up of isotropic homogenous materials. Uniform distribution and symmetric distribution of pores are used as two different types of porous material. Shear deformation is considered in the analysis by utilizing BEAM189 in ANSYS which is a finite element package program. This element is based on the first-order shear deformation theory. The influence of porosity coefficient, boundary conditions, and type of the porous material on the static response of the considered structures is presented in detail. The results demonstrate that the porosity coefficient has an important impact on the static response of the FGP sandwich beams.Öğe Estimation of Combustion Properties of Briquettes Produced from Palm Fruit Shell(İstanbul Gelişim Üniversitesi / Istanbul Gelisim University, 2023) Inegbedion, Francis; Erameh, Andrew AmagborAgricultural residue briquettes can be used as a fuel for heating, cooking and other domestic and industrial applications. This article explored the potential of using palm fruit shells to make briquettes as an alternative fuel for both domestic and industrial use. This will significantly reduce the problem of deforestation and excessive dependence on fossil fuels and reduce the impact of greenhouse gas emissions generated by trees as a fuel for wood. Cassava starch was used in an amount of 100:15 by weight and the burning properties of the produced palm fruit briquettes were determined. The combustion characteristics of the palm fruit briquettes produced are 7.56% average moisture, 17.45% average volatiles, 6.68% average ash, 68.28% average bound carbon and 9717.74 kcal /kg of average calorific value. These results, compared with the literature, showed that briquettes made from palm husks have good combustion properties, which makes them suitable for domestic applications and small industries.Öğe Production, and Analysis of a Two-Axis Food Liquid Pouring Machine(İstanbul Gelişim Üniversitesi / Istanbul Gelisim University, 2023) Erdoğan, Muhammed Ömer; Okatan, Ali; Uz, Umut; Yılmaz, Furkan; Çetinkaya, AliPeople always want to feel special and different. This demand has not left us alone in the food sector and has improved itself as culinary arts and presentations. So much so that there are masters who can transform food liquids, such as pancake liquids, into art by making special shapes on them based on demand. As in every sector, the effects of technology are also seen here. Considering these needs and developments, this study focused on the production and tests of machines that would convert the drawings designed by people with the help of computers into food liquid. The machine, produced in the context of the study, has a two-axis mechanical structure and gives shape to the food liquid with the commands coming from a computer and the liquid pouring chamber. While this machine aims to provide convenience to people in terms of time and ability, it also contributes to the developing technology in the kitchen sector. As the machine’s working principle, a drawing is created first with shapes that people can draw on a tablet or a computer in front of them if they want, or they can choose readymade. Then, this drawing is converted to g code via the program and the movement coordinates of the pouring mouth of the machine are created. The system, controlled by a microprocessor, drives the motors and performs the operation. While the pouring process is supported with the help of a chamber air control system in which the food liquid is located, the cooking of the food liquid is ensured by the heat-adjustable tray under it.
