bluuebunny/crossref_metadata_2025_split huggingface dataset:
Modulation and RS-CC rate specifications in WiMAX IEEE 802.16 Standard with MATLAB Simulink model
Authors: Al-Azzawi Fatima Faydhe , Al-Azzawi Zainab Faydhe , Shandal Shereen , Abid Faeza Abas 
Published: August 2020

Abstract
The intensive use of broadband system leading to focusing of telecommunication development industries, which are characterized by high quality features. Forthisissue, high transmission abilities in a new technologies systems have been designed. the WiMAX concept were proposed where a wireless transmission infrastructure that allows a fast deployment as well as low maintenance costs. Based on the IEEE 802.16-2004 standard, in this paper an end-to-end baseband model of the physical layer of a wireless metropolitan area network (WMAN) have been implemented using MATALB Simulink, according to the IEEE® 802.16-2004 standard. Supporting all of the mandatory coding and modulation options. It also illustrates Space-Time Block Coding (STBC), an optional transmit diversity scheme specified for use on the downlink. it illustrates the use of digital pre-distortion, a technique for extending the linear range of a nonlinear amplifier. Also modulation sets have been changed and tested in the model to reduce running time and power consumption. Finally, measurements of Error vector magnitude EVM and modulation error ratio MER were performed.
A Smart Biomedical Assisted System for Alzheimer Patients
Authors: Ahmed Qayssar A. , Al-Neami Auns Q. H. 
Published: August 2020

Abstract
In the last decades the health care developments highly rise the level of ages of world population. This improvement was accompanied by increasing the diseases related with elder like Dementia, which Alzheimer’s disease represent the most common form. The present study aims to design and implementation a medical system for improving the life of Alzheimer’s disease persons and ease the burden of their caregivers. A Smart Biomedical Assistance is an electronic device that provide around the clock monitoring the stability state of the Alzheimer’s patient, showing their location on the map, automatically reminders for medication times, and a call button for an emergency cases that the patient may pass through during the day. The device designed with two units one worn by the patient while the other is an internet of things technology (IoT) platform application used by the caregiver. The wearable unit was implemented by using a motion processing unit sensor, global positioning sensor module (GPS), heart rate sensor with microcontrollers and LCD display. This unit is supported by an (IoT) platform for communication with the patient from anywhere by the caregiver.
Analytical Model of a Holmium-doped Fiber Laser Including Up-conversion Transition
Authors: Khamis M A , Al-Abbasi Ziad Qais 
Published: August 2020

Abstract
This paper presents theoretical investigation of a holmium-doped fiber laser. Analytical model is developed to consider the effect of up-conversion transition on the laser performance. In this model, the core pumped system is simulated at in-band pumped scheme to optimize the fiber length, pump wavelength, pump power threshold and laser wavelength. A good agreement is achieved between the simulation findings and the experiment results. The results indicate the negative effect of up-conversion transitions on the performance of holmium-doped fiber lasers via reducing the laser efficiency. Understanding the impact of this interaction is helpful to describe the reason for obtaining a lower laser efficiency than expected in experimental reports of holmium-doped fiber lasers pumped at 1.95µm wavelength region. The developed model is suggested as valid tools to simulate and optimize any rare-earth doped fiber lasers and amplifiers.
Enhancement Mechanism of the Channel for Wireless Sensor Network
Authors: hashem Seham ahmed , Farhood Alaa Deshar , Naji Maham Kaml 
Published: August 2020

Abstract
Wireless sensor network contains set of self-organized sensors which are trademark by confined energy of preparing and constrained battery vitality. It is used in various correspondences and enterprises viewpoints. Sensors hubs check the activities and send it to multi hub steering to the expected collector jump for making the handling these activities. The routing is developed by utilizing responsive and proactive directing conventions. Clog happens because of information stream passing which supersedes the most extreme limit of channel and the limit line of every jump. The Quality of service (QoS) of the sensor arrange application will be decreased, because of losing the information due to the. This paper considers the blockage probability with a particular ultimate objective to diminish its occasions in Wireless sensor network (WSN) and settle it, and after that proposes a balanced and an altered steering convention to be specific Congestion Control Algorithm (CCA) which is used to reduce the clog in the event that it happens in wireless sensor network.
Based on Competitive Marketing: A New Framework mechanism in Social Media
Authors: Hashim Mohammed Mahdi , Ajeel Nidhal Khaleel , Alhamdane Hayder Jasim , Herez Atheer Hani , Taha Mustafa Sabah , Ali Adnan Hussein 
Published: August 2020

Abstract
In social merchandise, there are many similar products emanating from many enterprises. The enterprises want to scatter details for their products so that they are known widely in social media. This is because they believe in competitive advantage for commercial products. There has been research merging two enterprises for worldwide circulation and popularity. The initial procedure entails finding seed points then later disseminate details separately as per the separate Cascade approach. The aim is finding an initial common ground the dissemination to social platforms. Significant is also how fast data diffusion can be done. Data effect will arise from either none, one or more nodes in a social interconnection. Evaluation is also accomplished on the number of fraction parts in various sections are affected by the different rates of data diffusion. The simulation result for proposed framework introduces good outcomes result.
Fuzzy Logic Power Flow Control in divide Full Bridge Three-Port Converter
Authors: Al-Chlaihawi Sarab , Alrubei Mohammed A. T. , Al-Gizi Ammar , Al-Saadi Mohammed , Louzazni Mohamed 
Published: August 2020

Abstract
On this work, the three-port converter derivative from the full-bridge converter is analysed and control. The full-bridge converter is made up of two parts, A and B. Each part contains two switches with independent input sources. The inputs drive the load through a transformer that boosts voltage and provides isolation. The controller is an important portion of the converter. It controls the pass of power between the three ports. The controller uses Fuzzy Logic Control to make decisions regarding the two control signals for each part. These decisions are based on the variance between the whole energy generated by the photovoltaic panel and the energy demand at the load. The proposed design is verified through MATLAB and Simulink.
Modified inverse neural controller using adaptive gain factor for DC motor
Authors: Waheed Ali Reyadh , Issa Abbas Hussain , Hassan Mohammed Y 
Published: August 2020

Abstract
Disturbances and input changes effects lead to condition of error in the action integrity of control systems especially when the system is nonlinear. Adaptive controllers are being used to solve this problem. However they may add cost and complexity to the system design, and may not give the required action. This paper presents a DC motor speed controller using Inverse Neural controller and adaptive gain factor. The adaptive gain factor designed to be a function of the error signal (will be used to cancel the error in the controller signal), also a positive feedback from the output (to overcome the error of the plant) will be added to the adaptive gain factor signal to create a new input to the plant. Simulation results proved that the proposed method excellently controls the DC motor speed and evicts the steady-state response error thus; makes the output correctly tracking the desired input with minimum rising time, reduced peak time and settling time, and minimum peak overshoot, with average enhancement of 50% for each versus the results of PID controller for the same plant and same inputs. MATLAB R2015b, SIMULINK simulation has been used to simulate the system and obtain the results.
Implementation of Phase Shifted Carrier Modulation Technique for Cascaded Five-Level Inverter Using FPGA
Authors: Ibraheem Ahmed M. T. , Mohammed Laith A. , Ali Qusay H. 
Published: August 2020

Abstract
This paper presents the development of Xilinx Field Programmable Gate Array (FPGA) to control single phase Cascaded Multilevel Inverter (MLI). FPGA realizes high speed switching and attains a high over sampling rate. The FPGA provide eight control signals for five level output voltage using Phase Shifted Carrier (PSC) modulation technique. All the function modules of the designed program was implemented using Very High Speed Integrated Circuit Hardware Description Language (VHDL) and Xilinx ISE 9.2i software was employed as a simulation and compiler tool. The proposed strategy can provide a wide range of rms output voltage by varying the modulation index. The simulation of the system was carried out by Matlab/Simulink. Simulation and experimental results are provided.
Design and optimization of backstepping controller applied to autonomous quadrotor
Authors: Kadhim Mina Qays , Hassan Mohammed Y 
Published: August 2020

Abstract
In this paper a Quadrotor dynamics is exploited. This system dynamics is nonlinear, multivariable, coupled and unstable, and suffers from parameter uncertainties and external disturbances. Hence, controlling of Quadrotor is on demand to meet the stability, robustness, and desired dynamic properties, furthermore, to overcome the hindrance of nonlinearity and to have a system that is pliant to changing parameters and environmental disturbances. Three PID position controllers are used in the outer feedback loop to track the reference trajectory, while the angular rotations are controlled through the inner feedback backstepping control. The control law is derived based on Lyapunov stability theorem to render strong closed-loop stability. The tuning of the gains for both controllers is not convenient with this kind of system model due to high non-linearity and instability. Thereafter, the gains and parameters referred to both controllers are optimized using Particle Swarm Optimization algorithm (PSO) to find the best navigation routes and ensure compensation of nonlinearities and disturbances. This is performed by minimizing the 3 Dimensional position errors and 3Angular rotation errors using ITAE as a performance index. Simulation results presented using different types of trajectories have proved the enhancement in motion as compared with previous published papers.
An integral sliding mode control for the magnetic levitation system based on backstepping approach
Authors: Al-Samarraie Shibly Ahmed , Gorial Ivan Isho , Mshari Mustafa Hussein 
Published: August 2020

Abstract
Due to their reduced maintenance costs, increased power efficiency and reduced power consumption, the Magnetic Levitation (Maglev) system make a significant contribution to the industrial application. Maglev’s production of electricity (e.g. wind turbines), maglev trains and medical devices (e.g. artificial heart pump magnetically suspended) are typical applications. This paper suggests designing a nonlinear control for the Maglev system model which represented by a third-order model consists of the mechanical (ball position and velocity) and electrical (the current) subsystems. The controller is designed utilizing the Integral Sliding Mode Control (ISMC) and based on the Backstepping approach. The tracking accuracy of the ball position to the desired reference is determined by computing the ultimate boundedness as a function to the controller parameters and that using the Lyapunov function. The numerical simulation results showed the robustness and the efficiency of the proposed controller where the tracking error limited by the computed bound.
Performance Evaluation of a Campus HotSpot Network in Baghdad
Authors: Habeeb Habeeb.S. , Al_Yasiri Hayam A. , Al_Nakkash Aseel.H. 
Published: August 2020

Abstract
Wi-Fi evolving towards increase throughput and reduce delay enables providing reliable and seamless internet in a public and private venue or what is addressed as hotspots. The widespread of internet paves the road for smart cities and E-government systems development. This includes the educational sector, where internet becomes an integral part of the educational process. Deploying wireless Local Area Networks (LANs) in university campuses helps to provide the students with knowledge and academic information. In this work, a site survey for a large scale WiFi network deployed in Baghdad University College of Arts campus is conducted in order to evaluate the network performance in terms of; coverage, interference, Quality of Services (QoS). The statistical results obtained from the walk test are used to overcome the main problems and suggest solution for performance enhancement.
Design and Software Implementation of Multilevel Diode Clamped Converter
Authors: Shyaa Suha S , Hassan Raaed F 
Published: August 2020

Abstract
The work presented in this paper concerned with the design and software synthesis of multilevel diode clamped converter. Two topologies of this type of converters have been considered and tested. The first topology was three-level diode clamped converter, while the second one was the five-level diode clamped converter. The major task of the proposed work is to feed a three-phase load with semi-pure (low distorted) sinewave three-phase voltages. Simulation results show that an approximately unity power factor, low harmonic distortion and balance of capacitors voltages are achieved. The work presented for three level and five level to verify the positive effect of increasing the level of converter. The digital simulation is performed using the MATLAB / Simulink software.
Design and Implementation a New Real Time Overcurrent Relay Based on Arduino MEGA
Authors: Hameed Ali Abdulsattar , Sultan Ahmed Jasim , Booneya Mehdi F. 
Published: August 2020

Abstract
The relay is very important part of a power system to protect the electrical power system from the disturbances. The new proposed relay is overcurrent relay OCR that be used to protect the devices from any increasing of setting current. The new designs of OCR based on embedded system that used to emulate two characteristics: Instantaneous and Definite Time, The Instantinious work directly without any wait when the current exceed the max current that causes system damage, the other type is working when the passing current exceeded the setting current and at the same time the current continuous in a period of time. The proposed circuit which is used with three-phase power system load depending on the Arduino Mega as a main controller of OCR. The experimental results showed the reliability, sensitivity and flexibility under different operation conditions. This relay was tested on the modern electric system from (Audubon company) to several cases and the results showed the efficiency of the proposed OCR to protect the system.
Compact 3x1 Elements Reconfigurable MIMO Antenna for Cognitive Radio Applications
Authors: Jabber Abdullah A , Jassim Ali Khalid , Thaher Raad H 
Published: August 2020

Abstract
This paper presents, compact multiband frequency reconfigurable 3x1 MIMO antenna for cognitive radio applications. The antenna comprises 3-elements reconfigurable MIMO antenna and single element UWB sensing antenna. The frequency reconfigurability range under (S11 ≤ -10 dB) from 7-14.8 GHz using single PIN diode, while the UWB frequency range from 2.597-23.08 GHz. The antenna is designed and optimized to cover such wireless applications such as WiMAX, international telecommunication union (ITU), satellite, and broadband applications. The antenna is optimized using a Genetic Algorithm to operate in the MIMO and cognitive radio systems. The antenna dimensions for 3-elements MIMO antenna are 55 x 65 x 1.6 mm3 printed on an FR-4 epoxy substrate with relative dielectric constant εr = 4.3, loss tangent tan (δ) = 0.002 and 50 Ω microstrip feed line. The obtained simulated gain is ranging from 2.8-8.25 dB and the maximum simulated gain is 8.25 dB at 8.5 GHz. The return loss, Envelope Correlation Coefficient ECC, and Isolation are obtained to be less than -25 dB, less than 0.018, and less than -17 dB respectively. Detailed simulation results are explored and studied in this research. The CST software is used to simulate and optimize the proposed antenna.
Fabrication of magnetic water system for drip irrigation by using solar energy
Authors: Naser Kadhim Fadhil , Al-Hamadani Haider , Waroish Mustafa H. , Mahmood Haider F. 
Published: August 2020

Abstract
In present investigation solar power-driven irrigation system for magnetic water was established experimentally via the improvement of greater efficiency, economic solar Photovoltaic (PV) cell panels. This system reduced the using the oil fuel for power-driven irrigation systems and reduction in greenhouse gasses. The work was established in outdoor for 7 days and seven different water volume flow rates namely 0.5, 0.75, 1, 1.25, 1.5, 1.75, 2 Litter per minute (L/min).experiment tests on a half hourly foundation, from 8:00am to 16:00pm, with gage pressure, water flow rate, moisture, solar intensity, temperature, current, voltage measurements throughout each experiment. The results shown that directly influence of solar intensity on energy construction, also it is shown inversely proportional relationship between water flow rate and salinity of water. This system can pump and desalinate water from sewage or groundwater into the ground.
Design of a Smart Energy Management System for Photovoltaic Stand-Alone Building
Authors: Abbas Alaa Kh , Obed Adel A , Abid Ahmed J 
Published: August 2020

Abstract
PV stand-alone buildings, that depend completely on PV array, are suffering from the uncertainty of the supplied power due to weather conditions. To manage this uncertainty and reduce the risk of completely losing power, the proposed system offers a design that able to manage the consumed power according to the produced energy, battery capacity, and weather conditions, it also gives permission for the user to select its load priorities. A hardware prototype has been built to simulate all the system possible states included; PV voltage & current, the battery capacity, PV produced power, the loads. An ESP32 microcontroller has been used to adapt accurate forecasting and loads management strategy with a prediction model for managing the consumed energy with hourly and two days ahead planning. The results show a promising module that able to manage the stand-alone building energy without affecting the quality of life.
Numerical study for the ventilation with solar chimney under effect of different location and the shape of the section opening window
Authors: Mohamed Ahamed Q. , Alshara Ahmed K , Mitlaik Hussein M. 
Published: August 2020

Abstract
Heat transfer process and fluid flow in a solar chimney used for natural ventilation are investigated numerically in the present work. Solar chimney was tested by selecting different positions and shape of window namely: at the up, middle, and bottom side, as well as for horizontal and vertical and square shape windows. CFD analysis based on finite volume method is used to predict the thermal performance, and air flow in three dimensional solar chimney under steady state condition, to identify the effect of different parameters such as solar radiation. Results show that a solar chimney with horizontal at the bottom of the Room better ventilation performance.
Compressive strength and shrinkage of concrete containing calcium oxide (CaO) powder
Authors: Mahdi Zainab H. , Abbas Waleed A. , Abdulhussein Faisal K. , Abdulghani Mays R. , Hasan Mustafa Q. 
Published: August 2020

AbstractIn this study, CaO powder was added in proportions (1, 1.5, 2, and 2.5) % by weight of cement to concrete mixtures with mixing ratios (1: 2: 4 and 1: 1.5: 3). The ratio of water to cement used in mixing was 0.48 and 0.25 with 2% of superplasticizer (KUT PLAST Sp 400). The results showed that when adding CaO to the mixture (1: 2: 4) the highest compressive strength was for samples containing 2% CaO. Where the percentage of increase was 69.23% at 28 days age compared to the reference specimen of mixture (1: 2:4). The lowest percentage of shrinkage for specimens containing 1.5% CaO in the laboratory atmosphere at 25° C and humidity was 65%, while the specimens that were in the outside atmosphere at 40° C and humidity 20 % were lower percentages (0.673 and 0.405) %, respectively, compared with reference specimen of the same mixture. The results also showed that when the mixing ratio (1:1.5:3), the highest compressive strength was for specimens containing 2.5% CaO, and the lowest shrinkage was for samples containing 1.5% CaO. As the percentage of increase in compressive strength reached (73.58) % at the age of 28 days compared to the reference specimen of mixture (1:1.5: 3) and the percentage of decrease in shrinkage for specimens that were in the laboratory and outside atmosphere (7.44 and 7.77) %, respectively, compared to the reference specimens.
Stress-strain behaviour and flexural strength of silica fume polymer-modified concrete
Authors: Mezher Thaer Matlab , Breesem Khalid Mohammed , Hassen Douread Raheem , Jaafar Azhar Ayad 
Published: August 2020

Abstract
The adding of silica fume to mix is becoming a huge benefit due to an improvement of mechanical properties. The percent of adding is very important to get targeted mechanical properties. This study investigates the behaviour of polymer modified concrete (PMC) modified with different percentages of silica fume as a percentage of cement weight. Using silica fume powder leads to improve the behaviour of the stress-strain diagram until 10% from the weight of cement, and to increase the values of modulus of elasticity. More dosages of silica fume decrease the modulus of elasticity. The modulus of elasticity increased from 27932 MPa for reference mixes to 43029 MPa for mixes having 10% silica fume powder. Also the of flexural strength increases by increasing silica fume to 12.5%, then after this value is dropped. All of the tensile strength, flexural strength, and modulus of elasticity have been studied in this investigation.