Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Discipline
Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 2881 - 2910 of 1519116

Full-Text Articles in Entire DC Network

Sliding Mode Controller Design For Flexible Joint Robot, Ivan Gorial Aug 2026

Sliding Mode Controller Design For Flexible Joint Robot, Ivan Gorial

Engineering and Technology Journal

This paper suggests a flexible joint robot operated by brushed Direct Current (DC) motor model. Due to complex high-order, nonlinear dynamical system which operating under parameter’s uncertainty, sliding mode control (SMC) used to solve this problem of control the flexible joint robot. The SMC method is identified as one of the effective method to design robust control for the flexible joint robot, which based on t using a Low Pass Filter (LPF) with suitable time constant. The mathematical model is presented clearly and the simulations together with their analysis are done using MATLAB software. Simulation results display the efficacy of …

Go to article

High Rate Data Processing System Of 6x6 Mimo_Ofdm Using Fpga Technique With Spatial Algorithm, Muthna Fadhil Aug 2026

High Rate Data Processing System Of 6x6 Mimo_Ofdm Using Fpga Technique With Spatial Algorithm, Muthna Fadhil

Engineering and Technology Journal

OFDM has high spectral Performance and pliability in multipath channel effects while MIMO use another strategy for saving power of transmitter by using multi in multi out antennas to make throughput processing in high efficiency. The transceiver MIMO OFDM implemented on an FPGA typeSpartan3 XC3S200 with proper algorithm, Invoke method and QPSK modulation. The project prospective to improve the transceiver operations in terms of data transmission in high speed and saving power for wireless communication system take in consideration the cost of implementation hardware. In the result registered throughput data rate 425 Mbps using spatial algorithm (ICA with SD algorithm) …

Go to article

Speed Reference Tracking For Separately Excited Dc Motor Based Anfis And Hysteresis Current Control Techniques, Omar Mahmood Aug 2026

Speed Reference Tracking For Separately Excited Dc Motor Based Anfis And Hysteresis Current Control Techniques, Omar Mahmood

Engineering and Technology Journal

In this work, a closed loop control system has designed to control the speed of separately excited direct current motor (SEDCM) using Fuzzy (Mamdani and Sugeno) and an Adaptive Neuro - Fuzzy techniques (ANFIS). The action of these control techniques is to produce the reference armature current that has fed to the hysterics current controller (HCC) that produces the required gating signal to a Buck chopper .Different load conditions has been applied to the motor to obtain many mode of operation, the speed held constant at the required references values using both fuzzy (Mamdani-type and Sugeno-type) and ANFIS techniques. The …

Go to article

Evaluation And Improvement Performance Of A Boiler In A Thermal Power Plant Using Artificial Neural Network, Hosham Anead, Khaliid Sultan, Raheel Abd-Kadhum Aug 2026

Evaluation And Improvement Performance Of A Boiler In A Thermal Power Plant Using Artificial Neural Network, Hosham Anead, Khaliid Sultan, Raheel Abd-Kadhum

Engineering and Technology Journal

This research aims to avoid damage in power plant boiler steam generation by using Artificial Neural Network techniques (ANN) to improve the boiler performance. The training and testing using ANN by Back Propagation (BP) algorithm. The inputs to the neural network such factors which include air fuel ratio, water level, flame, gas, pressure and temperature. Control of the optimum input variables represent the output of the neural network. Experimental data is obtained by using an industrial boiler operating at AL-Dura power plant.the method of control by ANN is off – line ,the information of boiler taken from real plant and …

Go to article

Suggested Methods To Solve The Coils Misalignment For The Biomedical Implants, Saad Mutashar Aug 2026

Suggested Methods To Solve The Coils Misalignment For The Biomedical Implants, Saad Mutashar

Engineering and Technology Journal

One of the major problems of the inductive coupling link in the biomedical implantable devices is the misalignment between coils. This paper produces two simple suggested methods to avoid and reduce the misalignment between two coils. The first one is to split the implanted coil into two identical coils with 450 μH of inductance where the external coil was equal to them in inductance ~ 900μH.  The results show that the received powers are constant and compensated by one of the coils, which provides a stable power at the implant. The second proposed suggestion is to use two separated identical …

Go to article

The Relationship Between Data Transfer Rate And Distance In Power Networks Modems, Salih Mahmood Aug 2026

The Relationship Between Data Transfer Rate And Distance In Power Networks Modems, Salih Mahmood

Engineering and Technology Journal

With the rapid growth of communication networks, reliable and economical communication systems are needed and can be implemented in buildings. PLC uses electrical wiring to transmit information and provides high-speed and cheap data communications, such as home networks and Internet access. PLC is a hostile environment for communication, making communication signals spread difficult and experiencing significant challenges such as noise, attenuation and interference. This research focus on the challenges of communications via power lines such as distance and stability. Performance factors are tested and studied through the actual application of communication networks by connecting modems and computers in the network …

Go to article

Optimum Site Selection For Groundwater Wells Using Integration Between Gis And Hydrogeophysical Data, Nadia Aziz, Raghad Hasan, Zaidoon Abdulrazzaq Aug 2026

Optimum Site Selection For Groundwater Wells Using Integration Between Gis And Hydrogeophysical Data, Nadia Aziz, Raghad Hasan, Zaidoon Abdulrazzaq

Engineering and Technology Journal

This paper aim to select the best site to drill a groundwater wells by using of Geographic Information System (GIS) as a tool for decision-making. The study conducted in Fadak farm in Bahr Al-Najaf which is located west and southwest of Najaf city, and extends more than (40 km) away from it, to drill a new wells for irrigations usages. The optimal location selected depending on the available hydrogeophysical data includes resistivity, depth, thickness and transmissivity of aquifer. The weighted factor maps generated for the evidence layers were given weights depending on the significance of each parameter, these parameters were …

Go to article

Effects Of Enhancement P+ Layer On Igbt Operation, Inmar Ghazi, Hayder Assafli, Wail Nassir Aug 2026

Effects Of Enhancement P+ Layer On Igbt Operation, Inmar Ghazi, Hayder Assafli, Wail Nassir

Engineering and Technology Journal

IGBT (Insulated-gate bipolar transistor), is used widely in high voltage applications, it is very important to realize the doping profile in order to understand the design and the electrical performances of such devices. The performance depends on the layer, doping, and a carrier distribution among each layer. A specific selected layer can be added with precise properties for enhancing the device and increase the low current operate requirement. In this paper, an IGBT device is an enhanced and better performance achieved by the addition of a heavily positive doped intermediate layer. The collector current is decreased from 0.05 mA to …

Go to article

Dcf With Fbg For Dispersion Compensation In Optical Fiber Link At Various Bit Rates Using Duobinary Modulation Format, Hussein Mahmood Aug 2026

Dcf With Fbg For Dispersion Compensation In Optical Fiber Link At Various Bit Rates Using Duobinary Modulation Format, Hussein Mahmood

Engineering and Technology Journal

Dispersion is one of the very important parameters that effect on the performance of optical fiber communication systems. It causes pulse broadening, limiting of transmission distance and the number of channels on optical fiber link and low Bit rate. Dispersion compensation fiber (DCF) based on Fiber Bragg Grating (FBG) is widespread used in the dispersion compensation scheme. In this work, the proposed dispersion compensation fiber is included (pre – post–symmetrical) schemes with Fiber Bragg Grating and duo-binary modulation format. These are at various bit rates (10 Gbit/s, 20 Gbit/s, 30 Gbit/s and 40 Gbit/s) and different input laser power from …

Go to article

Specific Absorption Rate (Sar) Simulated For Square Patch Antenna Of Head Tissues, Ahmed Ahmed Aug 2026

Specific Absorption Rate (Sar) Simulated For Square Patch Antenna Of Head Tissues, Ahmed Ahmed

Engineering and Technology Journal

Square patch antennas (SPA) are widely used today is in wireless communication systems, mainly with a popular frequency of 2.4 GHz. Wireless devices is the main source of electromagnetic (EM) radiation, which penetrates the tissues of human and causes health danger. In this paper, SPA antenna is designed, simulated and evaluated at 2.4 ������ for internet application by using CST Microwave studio 2014. Specific absorption rate (SAR) is the term, which measures the exposure of human to EM radiation of communication antenna. SAR values are calculated over 1 ���� ������ 10 ���� mass of tissues, according to the IEEE and …

Go to article

Select The Best Cyclic Prefix For Various Effective Area In An O-Ofdm System, Sinan Majid, Razi Al Azawi, Rend Alrays Aug 2026

Select The Best Cyclic Prefix For Various Effective Area In An O-Ofdm System, Sinan Majid, Razi Al Azawi, Rend Alrays

Engineering and Technology Journal

In the past few years, the Optical Orthogonal Frequency Division Multiplexing (O-OFDM) has been deliberated as a promising future in high data transmission technology. OFDM is a special case of FDM technology, which is a multi-carrier-modulation (MCM). OFDM has been developed in the wireless as well as wireline systems, for that reason it is popularly used in optical transmission systems. O-OFDM system is simulated with Optisystem V14.0 program from @Optiwave company. This paper provides an examination of O-OFDM system using different cyclic prefix length to eliminate the effect of ICI and ISI, on the other hand using different values of …

Go to article

On The Performance Of A Microstrip Antenna Based Uc-Pbg Structures For Uhf Rfid Readers, Ali Jalal, Marwa Jwair Aug 2026

On The Performance Of A Microstrip Antenna Based Uc-Pbg Structures For Uhf Rfid Readers, Ali Jalal, Marwa Jwair

Engineering and Technology Journal

Microstrip antennas suffer from low gain bandwidth product due to surface wave effects and aperture diffractions that limit their use for long-range communications. On top of that, the difficulty of achieving a pure circularly polarized radiation with high gain due to the feeding structure effects. This paper is subjected to design a gain enhanced circularly polarized patch antenna using Uniplanar Compact-Photonic Band Gap (UC-PBG) structu.res for UHF RFID applications. The patch is structured as truncated corners with cross slots at the centre mounted on an FR-4 epoxy substrate of 1.6mm thickness with an overall area of 188×188mm2. The UC-PBG is …

Go to article

Design Of Compact Dual-Mode Bpfs Based On Cantor Fractal Geometry With U-Shaped Capacitive Coupling, Seevan Abdulkareem Aug 2026

Design Of Compact Dual-Mode Bpfs Based On Cantor Fractal Geometry With U-Shaped Capacitive Coupling, Seevan Abdulkareem

Engineering and Technology Journal

This study displays two microstrip bandpass filters using dual mode loop and patch resonators in form of Cantor geometry. The proposed filters exhibits one and two bands frequency responses for each of them respectively. The microstrip filter using Cantor loop has been tested by AWR 12 software package at resonances of 4.55 and 4.58 GHz, whereas for Cantor dual band patch filter has been simulated at band frequencies of 3.6 and 6.84 GHz respectively. RT/ Duroid 6010 substrate has been adopted for filter designs with thickness and relative permittivity of 1.27 mm and 10.8, respectively. The simulated filters have notable …

Go to article

Design And Implementation Of A Two Stage Controller For Ball And Beam System Using Fpga, Ivan Hashim, Ekhlas Karam, Noor Abdul-Jaleel Aug 2026

Design And Implementation Of A Two Stage Controller For Ball And Beam System Using Fpga, Ivan Hashim, Ekhlas Karam, Noor Abdul-Jaleel

Engineering and Technology Journal

The ball and beam is, in fact, a standout amongst the essentially vital models, which are generally utilized for educating the control system because its simplicity to be built, modeled, and controlled. This system involve a ball roll on a beam and since the angle of the beam manipulate by servo motor, so the purposes of this paper is to design two stages controller to stabilize the ball position along the beam by varying the angle of beam. The First controller stage “is Proportional- Integral- Derivative” (PID) “for servo motor. The second stage of the controller is Proportional-Derivative (PD) to …

Go to article

Reliability Evaluation Of Al_Mansour 11kv Distribution Network In Baghdad City, Thamir Abdul-Wahhab, Riyadh Ahmed Aug 2026

Reliability Evaluation Of Al_Mansour 11kv Distribution Network In Baghdad City, Thamir Abdul-Wahhab, Riyadh Ahmed

Engineering and Technology Journal

Reliability is a key aspect of power system design and planning. This work aims to evaluate and improve the reliability of a power distribution network in Baghdad city. The minimal cut set method has been adopted for reliability evaluation. Evaluating the reliability requires calculating and evaluating a set of reliability indices. In this research, the reliability indices are calculated for Al_Mansour 11kV distribution network in Baghdad city. According to these indices several improvements have been proposed and simulated on the network as follows: Adding N/C manually switches in the network for isolating fault area and restoring the service to the …

Go to article

The Growth Characteristics Of Rf-Magnetron Sputtered Nanocrystalline Tio2 Thin Films, Azhar Sadkhan, Suaad Mohammed, Mohammed Khalaf Aug 2026

The Growth Characteristics Of Rf-Magnetron Sputtered Nanocrystalline Tio2 Thin Films, Azhar Sadkhan, Suaad Mohammed, Mohammed Khalaf

Engineering and Technology Journal

In this paper, RF Magnetron sputtered TiO2 thin films deposited onglass slices at various powers (75,100,125 and 150) Watt for (1.5) hour anddifferent thickness (62.5-88-118 and 132.6) nm, the TiO2 thin films annealed with400°C for 2 hour and the morphology and structure of these films are describedby X-ray diffraction XRD and atomic force microscopy AFM to show the phasestructure. X-ray diffraction investigation uncovered that the crystalline size of theTiO2 thin films displays an expanding pattern with increasing the sputteringpower. The preferred orientation of (101) was watched for the films depositedwith sputtering power of (75,100,125 and 150) Watt.

Go to article

Intrusion Detection System Based On Data Mining Techniques To Reduce False Alarm Rate, Sarah Shareef, Soukeana Hashim Aug 2026

Intrusion Detection System Based On Data Mining Techniques To Reduce False Alarm Rate, Sarah Shareef, Soukeana Hashim

Engineering and Technology Journal

Nowadays, Security of network traffic is becoming a major issue ofcomputer network system according to the huge development of internet.Intrusion detection system has been used for discovering intrusion and tomaintain the security information from attacks. In this paper, produced twolevels of mining algorithms to construct Network Intrusion Detection System(NIDS) and to reduce false alarm rate, in the first level Naïve Bayes algorithmis used to classify abnormal activity into the main four attack types fromnormal behavior. In the second level ID3 decision tree algorithm is used toclassify four attack types into (22) children of attacks from normal behavior.To evaluate the performance …

Go to article

Sensor Network Based Animals Feeding And Milk Production Management System, Zena Faris, Muayad Croock Aug 2026

Sensor Network Based Animals Feeding And Milk Production Management System, Zena Faris, Muayad Croock

Engineering and Technology Journal

In general, the animals’ feeding requires a lot of time and efforts spent by the cattlemen. Part of the feeding amount is consumed by the animal to save its life and the other part is considered for instrumental milk production. The type of food in addition to the number of feeding frequents are important factors in changing the amount of produced milk as well as the weight of an animal. In this paper, we propose a control system that manage the forage process and the amount of produced milk by determining the quantity and number of feeding animals using sensor …

Go to article

New Strategies For Associative Memories, Azad Kareem, Saja Talib Aug 2026

New Strategies For Associative Memories, Azad Kareem, Saja Talib

Engineering and Technology Journal

Associative memory is a neural network used to save collection of input and output data at its layers. Each output data is produced coincide with a given input. It can be useful as an artificial memory in many applications like (military, medical, data security systems, error detection and correction systems …etc.). There are two matters which limit the uses of associative memory; the limited storage capacity, and the error occurred in the reading of output data. A modified strategy is suggested to overcome these limitations by introducing a new algorithm to the design of the associative memory. This method provides …

Go to article

Frequency Reconfigurable Monopole Antenna Using Switchable Slotted Triangular Radiators, Fayyadh Ahmed, Bayez Al-Sulaifanie Aug 2026

Frequency Reconfigurable Monopole Antenna Using Switchable Slotted Triangular Radiators, Fayyadh Ahmed, Bayez Al-Sulaifanie

Engineering and Technology Journal

A new configuration of multi-state switchable wideband /multi-narrowband is demonstrated. The proposed antenna is based on a printed rectangular monopole antenna (PRMA) that covers wideband 3.3 GHz WiMAX frequency range. To generate a multi-state switchable antenna, center part of PRMA has been removed without distorting the PRMA behavior. Three PIN diode switches are used to control different operating modes. Eight-operating modes, 2n modes (n is number of switches) are achieved by setting the switches ON or OFF. Initial results were obtained by using short and open circuits instead of implanting PIN diode. The merit of the antenna design is that …

Go to article

Design And Analysis Of American Sign Language Classifier Based On N-Tuple Technique, Mahmuod Al-Muifraje, Thamir Saeed, Mosab Hassan Aug 2026

Design And Analysis Of American Sign Language Classifier Based On N-Tuple Technique, Mahmuod Al-Muifraje, Thamir Saeed, Mosab Hassan

Engineering and Technology Journal

This work consists of three stages: the first stage is the collection of data (images) for 26 letters alphabet, which is 1040 images, 40 for each class (letter). The second stage is the Preprocessing (segmentation, filtering, crop, convert to a binary image and feature extraction) and the last stage is the classy one. Two filters have been used median and wiener2 to treatment two types of noise; the salt and pepper and Gaussian noise respectively. The classification has been satisfied by using an n-tuple classifier algorithm is 93.8462%, while it is 93.2692% with salt and pepper noise. In this context, …

Go to article

Robust Visual Lips Feature Extraction Method For Improved Visual Speech Recognition System, Mahmuod Mahmmed, Thamir Saeed, Wissam Ali Aug 2026

Robust Visual Lips Feature Extraction Method For Improved Visual Speech Recognition System, Mahmuod Mahmmed, Thamir Saeed, Wissam Ali

Engineering and Technology Journal

Recently, automatic lips reading ALR acquired a significant interest among many researchers due to its adoption in many applications. One such application is in speech recognition system in noisy environment, where visual cue that contain some integral information added to the audio signal, as well as the way that person merges audio-visual stimulus to identify utterance. The unsolved part of this problem is the utterance classification using only the visual cues without the availability of acoustic signal of the talker's speech. By taking into considerations a set of frames from recorded video for a person uttering a word; a robust …

Go to article

The Role And Important Of Internet Of Things In Building Sustainable City, Nahla Alwan, Muna Al-Nuaimi Aug 2026

The Role And Important Of Internet Of Things In Building Sustainable City, Nahla Alwan, Muna Al-Nuaimi

Engineering and Technology Journal

Every year many people migrate from country to city to live there. This will load a big pressure on the whole living in the city, Baghdad city also suffer from this problem in addition to other found problems like energy consumption , waste accumulate , Traffic congestion, noise, environmental pollution. To offer a good sustainable future living to population without any damage to environment and to solve many problems , one can use internet of things which is the connection network of the things especially with high spread of networks now which Internet of things based on it .the purpose …

Go to article

Antioxidant Activity Of Linalool, Majid S. Jabir, Ali Taha, Usama Sahib Aug 2026

Antioxidant Activity Of Linalool, Majid S. Jabir, Ali Taha, Usama Sahib

Engineering and Technology Journal

In recent years, Essential oils from their various aromatic plants hadbeen reported to be used in treating of many types of cancer due to their antitumoractivity. In addition, numerous studies had investigated the highest capability ofchemopreventive phytochemicals compound to act as anticancer drugs. In thepresent research, the antioxidant activity of Linalool on free radicals compoundswas studied. The Antioxidant activity was performed using two methods, DPPHand Hydrogen Peroxide (H2O2) Scavenging Capacity. The DPPH scavengingactivity demonstrated that Linalool had antioxidant activity comparing withascorbic acid. Linalool demonstrated moderate antioxidant activity with50.57471% compared with ascorbic acid that showed 86%. Meanwhile, H2O2scavenging capacity methods investigated …

Go to article

Text File Hiding Randomly Using Secret Sharing Scheme, Yossra Ali, Hussein Mankhi Aug 2026

Text File Hiding Randomly Using Secret Sharing Scheme, Yossra Ali, Hussein Mankhi

Engineering and Technology Journal

Exchange of information through the channels of communication can beunsafe. Communication media are not safe to send sensitive information so it isnecessary to provide the protection of information from disclosure to unauthorizedpersons. This research presented the method to information security is donethrough information hiding into the cover image using a least significant bit (LSB)technique, where a text file is encrypted using a secret sharing scheme. Then,generating positions to hiding information in a random manner of cover image,which is difficult to predict hiding in the image-by-image analysis or statisticalanalyzes. Where it provides two levels of information security through encryptionof a text …

Go to article

Design A Fuzzy Pid Controller For Trajectory Tracking Of Mobile Robot, M.J. Mohamed, M.Y. Abbas Aug 2026

Design A Fuzzy Pid Controller For Trajectory Tracking Of Mobile Robot, M.J. Mohamed, M.Y. Abbas

Engineering and Technology Journal

In this paper, a trajectory tracking control for a non-holonomic differential wheeled mobile robot (WMR) system is presented. A big number of investigations have been used the kinematic model of mobile robot which is a nonlinear model in nature, thus a hard task to control it. This work focuses on the design of fuzzy PID controller tuned with a firefly optimization algorithm for the kinematic model of mobile robot. The firefly optimization algorithm has been used to find the best values of controller's parameters. The aim of this controller is trying to force the mobile robot tracking a pre-defined continuous …

Go to article

A Multiband Printed Slot Antenna Loaded With Trapezoidal Slots For Wlan And Wimax Applications, H.T. Ziboon Aug 2026

A Multiband Printed Slot Antenna Loaded With Trapezoidal Slots For Wlan And Wimax Applications, H.T. Ziboon

Engineering and Technology Journal

In this paper, a multiband printed antenna has been proposed. The antenna structure is inspired from that of the classical multi-cavity magnetron resonator. The antenna structure is composed of a slot annular ring structure etched on the ground plane of a substrate. The outer circle of the annular ring is loaded with radially arranged small trapezoidal slots. While on the other side of the substrate, the antenna is fed with a 50-Ohm microstrip line. A parametric study has been conducted to explore the effect of the different antenna dimensions on its performance. The results show that the proposed antenna offers …

Go to article

Indian Number Handwriting Features Extraction And Classification Using Multi-Class Svm, H.A. Jeiad Aug 2026

Indian Number Handwriting Features Extraction And Classification Using Multi-Class Svm, H.A. Jeiad

Engineering and Technology Journal

In this paper, an Indian Number Handwriting Recognition Model (INHRM) is proposed. Mainly, the proposed model consists of four phases which are the image acquisition, image preprocessing, features extraction, and classification model. Initially, the captured images of the handwritten Indian numbers were enhanced and preprocessed to obtain the skeleton for the interested object. The extracted features of the handwritten Indian numbers were obtained by calculating four parameters for each captured number sample, these parameters are the number of starting points, the number of intersection points, the average zoning which consists of four values, and finally, the normalized chain vector of …

Go to article

Design And Simulation Of Six-Band Triplexer Filter For Wlan Systems, A.S. Ezzulddin, S.K. Khaleel Aug 2026

Design And Simulation Of Six-Band Triplexer Filter For Wlan Systems, A.S. Ezzulddin, S.K. Khaleel

Engineering and Technology Journal

This paper presents microstrip triplexer with 6 bands frequency responses. The design of triplexer uses 6 cross coupled resonators based on step impedance resonator. Each one of these resonators has short or open-ended section that initiates dual-band response with a large rejection band. The presented device has 3 two-pole dual band filter channels that are joint with regular T-shaped feeders. This triplexer has miniature area in term of

Go to article

H-Infinity Model Reference Controller Design For Magnetic Levitation System, H.I. Ali Aug 2026

H-Infinity Model Reference Controller Design For Magnetic Levitation System, H.I. Ali

Engineering and Technology Journal

In this paper, a new robust approach based on combining the model reference control with H-infinity technique is proposed. The goal of the proposed controller is to obtain an adequate transient response which may not be obtained when only H-infinity technique is used. This is done by adding the model reference block to the standard H-infinity feedback configuration. Then the overall block diagram is formulated by linear fractional transformation (LFT). The Magnetic Levitation which is a highly nonlinear, open loop unstable and uncertain system is used to show the effectiveness of the proposed controller. The results show that the proposed …

Go to article

First Prev Next Last