Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Law (325188)
- Arts and Humanities (173737)
- Social and Behavioral Sciences (129447)
- Education (65734)
- Medicine and Health Sciences (62684)
-
- Life Sciences (53834)
- Creative Writing (44454)
- Physical Sciences and Mathematics (42886)
- Religion (39487)
- Business (36338)
- History (31976)
- Engineering (27419)
- Sociology (27029)
- International Law (23106)
- Communication (23031)
- Constitutional Law (20691)
- English Language and Literature (19266)
- Criminal Law (19065)
- Higher Education (17433)
- Poetry (17389)
- Public Affairs, Public Policy and Public Administration (15900)
- Accounting (15634)
- Library and Information Science (15310)
- Art and Design (12991)
- Mass Communication (12570)
- Journalism Studies (11879)
- Fiction (11274)
- Environmental Law (11164)
- Intellectual Property Law (11128)
- Public Health (11031)
- Institution
-
- University of South Florida (92061)
- Brigham Young University (41620)
- TÜBİTAK (28370)
- Chulalongkorn University (22414)
- University of Michigan Law School (18621)
-
- University of New Mexico (17945)
- University of Mississippi (17549)
- Universitas Indonesia (16159)
- University of Northern Iowa (15447)
- Purdue University (14990)
- Southern Methodist University (13938)
- University of Denver (13433)
- San Jose State University (13134)
- Nova Southeastern University (12697)
- Association of Arab Universities (12610)
- Western Michigan University (11028)
- Butler University (10981)
- Fordham Law School (10956)
- Osgoode Hall Law School of York University (10764)
- Duke Law (10147)
- Grand Valley State University (9980)
- DePaul University (9939)
- University of South Carolina (9582)
- U.S. Naval War College (9457)
- St. John's University School of Law (9314)
- Northwestern Pritzker School of Law (9160)
- Case Western Reserve University School of Law (9056)
- University of North Carolina School of Law (8692)
- Duquesne University (8201)
- UC Law SF (8172)
- Keyword
-
- Newspaper (11462)
- Spartan Daily (11411)
- Poetry (7905)
- UAB (7295)
- Book review (5123)
-
- The U.S. Naval War College (4476)
- Linguistics (4262)
- Literary (4039)
- Litmag (4016)
- History (3909)
- Law (3709)
- Education (3665)
- Literature (3514)
- Poem (3278)
- Mormon studies (2880)
- Fiction (2788)
- Journal (2768)
- Book Review (2721)
- COVID-19 (2561)
- United States (2510)
- Newsletter (2485)
- Texas (2363)
- Archaeology (2343)
- Western Australia (2291)
- Technology (2200)
- Women (2199)
- Afghanistan Newspaper (2187)
- Human rights (2155)
- Constitutional law (2079)
- Higher education (1991)
- Publication Year
-
- 2026 (37814)
- 2025 (44934)
- 2024 (75586)
- 2023 (42468)
- 2022 (44661)
-
- 2021 (45129)
- 2020 (41972)
- 2019 (38385)
- 2018 (43077)
- 2017 (41428)
- 2016 (36689)
- 2015 (34422)
- 2014 (31433)
- 2013 (32609)
- 2012 (33101)
- 2011 (23374)
- 2010 (21549)
- 2009 (19305)
- 2008 (18705)
- 2007 (17971)
- 2006 (17399)
- 2005 (17066)
- 2004 (16330)
- 2003 (15654)
- 2002 (15015)
- 2001 (14688)
- 2000 (14707)
- 1999 (14647)
- 1998 (13935)
- 1997 (12753)
- Publication
-
- The Auk (22791)
- Michigan Law Review (12807)
- Condor (11821)
- Spartan Daily (School of Journalism and Mass Communications) (11411)
- Wilson Bulletin (9476)
-
- Saudi Medical Journal (7855)
- Naval War College Review (7468)
- Against the Grain (7173)
- Journal of Extension (6950)
- Journal of Criminal Law and Criminology (6734)
- Journal of Accountancy (6700)
- Proceedings of the Iowa Academy of Science (6507)
- Denver Law Review (6370)
- St. John's Law Review (6329)
- Louisiana Law Review (6126)
- North Carolina Law Review (6028)
- Journal of Undergraduate Research (5570)
- The Prairie Light Review (5566)
- Children's Book and Media Review (5535)
- Food and Machinery (5442)
- West Virginia Law Review (5339)
- University of Chicago Law Review (5248)
- Fordham Law Review (5102)
- Turkish Journal of Medical Sciences (5093)
- Word Ways (4969)
- Indiana Law Journal (4903)
- International Journal of Exercise Science: Conference Proceedings (4890)
- Kentucky Law Journal (4652)
- Marquette Law Review (4437)
- BYU Studies (4341)
Articles 3361 - 3390 of 1265985
Full-Text Articles in Entire DC Network
The Effects Of Sunlight On Particle Matter & Radiation Pollution In Baghdad Airport Area, Fatima Hameed, Faris Mohammed, Abdul Hameed Al-Obaidy
The Effects Of Sunlight On Particle Matter & Radiation Pollution In Baghdad Airport Area, Fatima Hameed, Faris Mohammed, Abdul Hameed Al-Obaidy
Engineering and Technology Journal
The gasses emitted from the various activities, in addition to particle matter (PM10) play a major role in air quality deterioration. Particles matter and radiation are two of the most important parameters that exist in airports and were evaluated considering the variations in sunlight energy. The measured values were collected from eleven sites, which were chosen based on their influence by aviation activities. The measurements were compared to the (Iraqi Regulations and U.S EPA) for particle matter. While for radiation, the measurements were compared with the U.S. National Institute of Health (NIH), International Commission on Radiological Protection (ICRP), and the …
Redesign Of Water Filter Workshop Using Slp, Nrjis Bassim, Luma Al-Kindi
Redesign Of Water Filter Workshop Using Slp, Nrjis Bassim, Luma Al-Kindi
Engineering and Technology Journal
Workshop and factory design is one of the most important problems facing companies to enhance their performance and productivity. Facility layout issue is a fundamental fragment of accommodations planning which have a target of organize all manufacturing entities to be located as a facility having the objective to improve manufacturing processes for an organization. The aim of this paper is to study, evaluate and then creating an improved water filter workshop adopting Muther’s (SLP) Systematic Layout Planning Procedure for increasing production and utilizing spaces. The case study in this paper is a practical one for the existing layout in Al-Faris …
Extraction Of Zirconium From Iraqi Bauxite Ore, Israa Aziz, Moayyed Jalhom, Muhanad Kheriallah
Extraction Of Zirconium From Iraqi Bauxite Ore, Israa Aziz, Moayyed Jalhom, Muhanad Kheriallah
Engineering and Technology Journal
This research is devoted to the study of the extraction of zirconium from Iraqi Bauxite Ore by using hydrometallurgical method. The chemical analysis was done to the bauxite ore by using X-ray florescence, X-ray diffraction and atomic absorption spectroscopy. Zirconium Extraction was performed via three stages; the first stage is leaching of bauxite with sodium hydroxide for alumina leaching. The second stage is leaching of zirconium species from the remained powder produced from stage one after washing with deionized water and, nitric acid (HNO3 solutions). The results of the first stage has reflected the recovery of 42.27 % of Al2O3 …
Properties And Behavior Of Starch Biopolymer Concrete, Waleed Abbas, Hawraa Mohsen
Properties And Behavior Of Starch Biopolymer Concrete, Waleed Abbas, Hawraa Mohsen
Engineering and Technology Journal
Starch act as natural polymer has been got from Wheat, Tapioca, and Corn. Corn starch has been investigated as biopolymer and has been added to concrete in different percentages (0%, 0.5%, 1%, and 1.5%) by cement weight and the study shows the effect of using starch on some properties of concrete in the fresh state ( slum and fresh density) and at hardened state (compressive strength, splitting tensile strength and flexural strength) at 28 days. The mix proportion was(1:2.3:2.3) (cement: sand: gravel) respectively and at constant w/c equal to 0.47.The results indicate that the optimum percentage of starch addition was …
Effect Of Sic-Cu Electrode On Material Removal Rate, Tool Wear And Surface Roughness In Edm Process, Yousif Laibi, Saad Shather
Effect Of Sic-Cu Electrode On Material Removal Rate, Tool Wear And Surface Roughness In Edm Process, Yousif Laibi, Saad Shather
Engineering and Technology Journal
Electrical discharge machining (EDM) is one of the most common non-traditional processes for the manufacture of high precision parts and complex shapes. The EDM process depends on the heat energy between the work material and the tool electrode. This study focused on the material removal rate (MRR), the surface roughness, and tool wear in a 304 stainless steel EDM. The composite electrode consisted of copper (Cu) and silicon carbide (SiC). The current effects imposed on the working material, as well as the pulses that change over time during the experiment. When the current used is (8, 5, 3, 2, 1.5) …
The Formability And Elongation Of Aluminum Alloys Aa5083 And Aa3003 For Micro-Truss Sandwiches Manufacturing, Arwa Tawfeeq, Matthew Barnett
The Formability And Elongation Of Aluminum Alloys Aa5083 And Aa3003 For Micro-Truss Sandwiches Manufacturing, Arwa Tawfeeq, Matthew Barnett
Engineering and Technology Journal
The development in the manufacturing of micro-truss structures has demonstrated the effectiveness of brazing for assembling these sandwiches, which opens new opportunities for cost-effective and high-quality truss manufacturing. An evolving idea in micro-truss manufacturing is the possibility of forming these structures in different shapes with the aid of elevated temperature. This work investigates the formability and elongation of aluminum alloy sheets typically used for micro-truss manufacturing, namely AA5083 and AA3003. Tensile tests were performed at a temperature in the range of 25-500 ○C and strain rate in the range of 2x10-4 -10-2 s-1. The results showed that the clad layer …
Path Planning Of Mobile Robot Using Improved Artificial Bee Colony Algorithm, Rkaa Kamil, Mohamed Mohamed, Bashra Oleiwi
Path Planning Of Mobile Robot Using Improved Artificial Bee Colony Algorithm, Rkaa Kamil, Mohamed Mohamed, Bashra Oleiwi
Engineering and Technology Journal
A modified version of the artificial Bee Colony Algorithm (ABC) was suggested namely Adaptive Dimension Limit- Artificial Bee Colony Algorithm (ADL-ABC). To determine the optimum global path for mobile robot that satisfies the chosen criteria for shortest distance and collision–free with circular shaped static obstacles on robot environment. The cubic polynomial connects the start point to the end point through three via points used, so the generated paths are smooth and achievable by the robot. Two case studies (or scenarios) are presented in this task and comparative research (or study) is adopted between two algorithm’s results in order to evaluate …
Absorption Of Carbon Dioxide Into Aqueous Ammonia Solution Using Blended Promoters (Mea, Mea+Pz, Pz+Argk, Mea+Argk), Farah Al-Sudani
Absorption Of Carbon Dioxide Into Aqueous Ammonia Solution Using Blended Promoters (Mea, Mea+Pz, Pz+Argk, Mea+Argk), Farah Al-Sudani
Engineering and Technology Journal
Absorption of CO2 into promoted-NH3 solution utilize a packed column (1.25 m long, 0.05m inside diameter) was examined in the present work. The process performance of four different blended promoters monoethanolamine (MEA)+ piperazine (PZ), piperazine (PZ)+ potassium argininate (ArgK) and monoethanolamine +potassium argininate was compared with unpromoted-NH3 solution by evaluated the absorption rate (φ_(CO_2 )) and overall mass transfer coefficient (K_(G,CO_2.) a_v) over the operating ranges of the studied process variables (1-15Kpa initial partial pressure of CO2, 5-15 Liter/min gas flow rate, 0.25-0.85 Liter/min liquid flow rate). The results exhibit that the absorption behavior and efficiency can be enhanced by …
Study Of The Influence Of Different Variables On Clathrate Practical Applications In Phenol Removal, Riyadh Al- Mukhtar, Shurooq Remedhan, Marwa Hussin
Study Of The Influence Of Different Variables On Clathrate Practical Applications In Phenol Removal, Riyadh Al- Mukhtar, Shurooq Remedhan, Marwa Hussin
Engineering and Technology Journal
In this work, effluent wastewater treated by using cyclopentane-water Clathrate system to treat water contaminates with phenols at concentrations (300, 250, 200, 150, 100 and 50) ppm in order to investigate the capability of process performance. Clathrate or hydrate are strong crystal structures including water (host particles) and little particles (guest particles). The experiments were conducted at different cyclopentane-water volume ratios (1: 2 and 1: 4). The work was done in a 250 ml glass cell with an electric mixer at a constant speed of 280 cycles per minute. Phenol was highest removal percent at 300ppm at 1: 4volume ratio …
Enhancement Of Edm Performance By Using Copper-Silver Composite Electrode, Saad Shather, Abbas Ibrahim, Zainab Mohsein, Omar Hassoon Hassoon
Enhancement Of Edm Performance By Using Copper-Silver Composite Electrode, Saad Shather, Abbas Ibrahim, Zainab Mohsein, Omar Hassoon Hassoon
Engineering and Technology Journal
Discharge Machining is a non-traditional machining technique and usually applied for hard metals and complex shapes that difficult to machining in the traditional cutting process. This process depends on different parameters that can affect the material removal rate and surface roughness. The electrode material is one of the important parameters in Electro –Discharge Machining (EDM). In this paper, the experimental work carried out by using a composite material electrode and the workpiece material from a high-speed steel plate. The cutting conditions: current (10 Amps, 12 Amps, 14 Amps), pulse on time (100 μs, 150 μs, 200 μs), pulse off time …
Optimal Model Reference Control Scheme Design For Nonlinear Strict-Feedback Systems, Musadaq Hadi, Hazem Ali
Optimal Model Reference Control Scheme Design For Nonlinear Strict-Feedback Systems, Musadaq Hadi, Hazem Ali
Engineering and Technology Journal
In this paper, a new design of the model reference control scheme is proposed in a class of nonlinear strict-feedback system. First, the system is analyzed using Lyapunov stability analysis. Next, a model reference is used to improve system performance. Then, the Integral Square Error (ISE) is considered as a cost function to drive the error between the reference model and the system to zero. After that, a powerful metaheuristic optimization method is used to optimize the parameters of the proposed controller. Finally, the results show that the proposed controller can effectively compensate for the strictly-feedback nonlinear system with more …
Improved Y-Source Single-Stage Transformerless Micro-Inverter For Pv Residential Applications, Firas Salih, Oday Ahmed
Improved Y-Source Single-Stage Transformerless Micro-Inverter For Pv Residential Applications, Firas Salih, Oday Ahmed
Engineering and Technology Journal
Y-Source Impedance Network (YSN) is one of the most suitable for providing high voltage gain. It generatesa high voltage gain by using a small shoot-through duty cycle, which makes it suitable in applications require a wide range of input voltages such as the Photovoltaic (PV) power plants. However, traditional (YSNs) are unable to boost low voltages in certain applications to the DC-link voltage (about 400V) since it requires a high number of the turns ratio. Higher turns ratio implies higher leakage inductance resulting in higher DC-link voltage spikes. Also, traditional YSNs have high voltage stresses across the components. In this …
Numerical And Experimental Explorations For The Formability Of Drawing Square Cups Through Deep Drawing Operation (January 2020), Nareen Obaeed
Numerical And Experimental Explorations For The Formability Of Drawing Square Cups Through Deep Drawing Operation (January 2020), Nareen Obaeed
Engineering and Technology Journal
This study aims to examine the formability of drawing cups having square shapes through direct deep drawing process on a single action press through one pass. This can be accomplished by conducting an FE simulation and performing an experimental investigation on steel substrate type AISI 1008 blank with diameter and thickness dimensions 80, 0.5 mm respectively. To explore and analyze the formability of such a drawing process, two process parameters have been included in this work which is the speed of punch (30 and 300 mm/min) and the lubrication state (with machine oil and dry drawing). Both direct and indirect …
Effect Of Polyvinyl Pyrrolidone On Polyvinyl Chloride-Graft-Acrylamide Membranes, Maha Al-Bahate, Kadhum Shabeeb, Bassam Khalil
Effect Of Polyvinyl Pyrrolidone On Polyvinyl Chloride-Graft-Acrylamide Membranes, Maha Al-Bahate, Kadhum Shabeeb, Bassam Khalil
Engineering and Technology Journal
Polyvinyl-chloride (PVC) was dehydrochlorinated by alkaline-solution (NaOH) in determining molarity (3.0 M) followed by grafting with acrylamide (AM) monomer onto dehydrochlorinated PVC (DHPVC) backbone by free-radical graft copolymerization to produce new grafted polymer referred as graft 3M. Then investigated the effect of polyvinyl pyrrolidone (PVP) addition on the grafted polymer. Membranes from pure PVC, graft 3M, and graft 3M/ PVP were synthesis via a phase inversion method. The successful AM grafting onto PVC was confirmed by characterization of the membranes by Atomic Force Microscopy (AFM) and Field Emission Scanning Electron Microscope (FESEM) analysis, porosity, pore size, and contact angle measurements. …
Nonlinear Finite Element Analysis Of High Strength Fiber Reinforced Concrete Beams, Zinah Abdul Hussein
Nonlinear Finite Element Analysis Of High Strength Fiber Reinforced Concrete Beams, Zinah Abdul Hussein
Engineering and Technology Journal
This research work presents a nonlinear finite element investigation on the behavior of high strength fiber reinforced concrete beams. This investigation is carried out in order to get a better understanding of their behavior throughout the entire loading history. The three- dimensional 20-node brick elements are used to model the concrete, while the reinforcing bars are modeled as axial members embedded within the concrete brick elements. The compressive behavior of concrete is simulated by an elastic-plastic work-hardening model followed by a perfectly plastic response, which terminate at the onset of crushing. In tension, a fixed smeared crack model has been …
Study The Effect Of Machine Efficiency In Production Lines Balancing, Rasha Marzoog, Sawsan Al-Zubaidy, Ahmed Alduroobi
Study The Effect Of Machine Efficiency In Production Lines Balancing, Rasha Marzoog, Sawsan Al-Zubaidy, Ahmed Alduroobi
Engineering and Technology Journal
Production Line Balancing (PLB) is the technique of assigning the operations to workstations in such a way that the assignment minimizes the idle time between workstations. PLB aims to equator the workload in each workstation to assure maximum production flow. By adding machine in specific configurations is one treatment which leads to this leveling in workload. This research studies the different efficiencies of the added machine and the effect of these efficiencies on line balancing to select the machine with suitable efficiency. This will be led to reduce the idle time between workstations and increasing production flow. The work time …
Integration Of Cad/Cae/Rp Environment For Developing A New Product In Medical Field, Nabeel Allawy, Amjad Abdulghafour
Integration Of Cad/Cae/Rp Environment For Developing A New Product In Medical Field, Nabeel Allawy, Amjad Abdulghafour
Engineering and Technology Journal
Reconstruction of the mandible after severe trauma is one of the most difficult challenges facing oral and maxillofacial surgery. The mandible is an essential element in the appearance of the human face that gives the distinctive shape of the face, holds. This paper aims to propose a methodology that allows the surgeon to perform virtual surgery by investing engineering programs to place the implant by default and with high accuracy within the mandible based on the patient's medical data. The current study involved a 35-year-old man suffering from a traffic accident in the mandible with multiple fractures of the facial …
Numerical And Experimental Modeling Of Indoor Air Quality Inside A Conditioned Space With Mechanical Ventilation And Dx-Air Conditioner, Wisam Mareed, Hasanen Hussen
Numerical And Experimental Modeling Of Indoor Air Quality Inside A Conditioned Space With Mechanical Ventilation And Dx-Air Conditioner, Wisam Mareed, Hasanen Hussen
Engineering and Technology Journal
Elevated CO2 rates in a building affect the health of the occupant. This paper deals with an experimental and numerical analysis conducted in a full-scale test room located in the Department of Mechanical Engineering at the University of Technology. The experiments and CFD were conducted for analyzing ventilation performance. It is a study on the effect of the discharge airflow rate of the ceiling type air-conditioner on ventilation performance in the lecture room with the mixing ventilation. Most obtained findings show that database and questionnaires analyzed prefer heights between 0.2 m to 1.2 m in the middle of an occupied …
Digital Change Detection And Map Analysis For Urban Expansion And Land Cover Changes In Karbala City, Noor Hamed, Muthanna Al Bayati, Haidar Mohammed
Digital Change Detection And Map Analysis For Urban Expansion And Land Cover Changes In Karbala City, Noor Hamed, Muthanna Al Bayati, Haidar Mohammed
Engineering and Technology Journal
Urban growth driven by uncontrolled expansion is one of the greatest problems that reduces the fertile lands in Karbala Governorate, Iraq. This phenomenon is the cause for variety of urban environmental problems such as an increase in local temperature, cost of land, and loss of agricultural produce. Multiple images of different time periods were used, passing them through a series of image processing steps according to the methodology of work to achieve the aims of the paper by calculating land cover changes for Karbala City from 1992 to 2013. The aim of this research is to take the temporal and …
Effect Of Filler Metals On Microstructure And Mechanical Properties Of Gtaw Welded Joints Of Aluminum Alloy (Aa2024-T3), Muna Abbass, Jihad Abd Ul-Qader
Effect Of Filler Metals On Microstructure And Mechanical Properties Of Gtaw Welded Joints Of Aluminum Alloy (Aa2024-T3), Muna Abbass, Jihad Abd Ul-Qader
Engineering and Technology Journal
This study presents an appropriate filler metal or welding electrode to join aluminum alloy (AA2024-T3) sheet of 3.2 mm thickness with a square butt joint using Gas Tungsten Arc Welding (GTAW) process. This process was carried out at three different welding currents with three various filler metals: ER4047 (12% Si), ER4043 (5% Si), and ER5356 (5% Mg). Experiments were conducted to investigate the microstructure and the mechanical properties. The effect of various filler metals upon the weld joints quality were analyzed via an X-ray radiographic and tensile test. Hardness test, microstructures, SEM, and XRD also conducted to the welded specimens. …
Effect Of Powder-Mixed Dielectric On Edm Process Performance, Safa Fadhil, Shukry Aghdeab
Effect Of Powder-Mixed Dielectric On Edm Process Performance, Safa Fadhil, Shukry Aghdeab
Engineering and Technology Journal
Electrical Discharge Machining (EDM) is extensively used to manufacture different conductive materials, including difficult to machine materials with intricate profiles. Powder Mixed Electro-Discharge Machining (PMEDM) is a modern innovation in promoting the capabilities of conventional EDM. In this process, suitable materials in fine powder form are mixed in the dielectric fluid. An equal percentage of graphite and silicon carbide powders have been mixed together with the transformer oil and used as the dielectric media in this work. The aim of this study is to investigate the effect of some process parameters such as peak current, pulse-on time, and powder concentration …
The Hybrid (Pvt) Double-Pass System With A Mixed-Mode Solar Dryer For Drying Banana, Abdullateef Jadallah, Mohammed Alsaadi, Saifalddeen Hussien
The Hybrid (Pvt) Double-Pass System With A Mixed-Mode Solar Dryer For Drying Banana, Abdullateef Jadallah, Mohammed Alsaadi, Saifalddeen Hussien
Engineering and Technology Journal
This paper proposes a developed numerical and experimental design of a hybrid Photovoltaic-Thermal (PVT) double-pass counter-flow system connected with the mixed-mode solar dryer system. The mixed-mode solar dryer considers the most efficient mode because it has two heat sources, from solar radiation and the hot airflow which is supplied by the PVT system. The PVT system is often unused for drying applications; therefore, the whole proposed PVT solar system in this work is utilized for drying applications. This system is not only massive fuel savings, but also crucial to improve the quality of the dried product in terms of color, …
Simulation Design Of Blood-Pump Intelligent Controller Based On Pid-Like Fuzzy Logic Technique, Raghda Raheem, Mohammed Y., Saleem Kadhim
Simulation Design Of Blood-Pump Intelligent Controller Based On Pid-Like Fuzzy Logic Technique, Raghda Raheem, Mohammed Y., Saleem Kadhim
Engineering and Technology Journal
This paper presents a blood pump with a bearingless brushless DC motor, supported by speed, torque, and suspension force controllers. Simulation of the pump motor and its controllers tested by MATLAB/Simulink. Two Proportional plus Integral (PI) controllers are employed for controlling the rotational speed and torque of the motor. For controlling the suspension force a comparative study is presented between the Proportional plus Integral plus Derivative (PID) controller and two inputs PID-like Fuzzy Logic Controller (FLC). A particle swarm optimization technique is used to find the best values for the controller’s parameters. The results of the speed and torque controllers …
Direct Current Deadbeat Predictive Controller For Bldc Motor Using Single Dc-Link Current Sensor, Qaed Ali, Mohammed Ezzaldean
Direct Current Deadbeat Predictive Controller For Bldc Motor Using Single Dc-Link Current Sensor, Qaed Ali, Mohammed Ezzaldean
Engineering and Technology Journal
BLDC motors are characterized by electronic commutation, which is performed by using an electric three-phase inverter. The direct control system of the BLDC motor consists of double loops; including the inner-loop for current regulating and outer-loop for speed control. The operation of the current controller requires feedback of motor currents; the conventional current controller uses two current sensors on the ac side of the inverter to measure the currents of two phases, while the third current would be accordingly calculated. These two sensors should have the same characteristics, to achieve balanced current measurements. It should be noted that the sensitivity …
Experimental Study On Performance And Emission Characteristic Of Diesel Engine Using Sunflower Oil Biodiesel Blends, Ghassan Ali, Abed Al-Kadim Hassan
Experimental Study On Performance And Emission Characteristic Of Diesel Engine Using Sunflower Oil Biodiesel Blends, Ghassan Ali, Abed Al-Kadim Hassan
Engineering and Technology Journal
Biodiesel fuel is a liquid biofuel produced by chemical process form new and used phytogenic oils, animal fats. Biodiesel fuels can be utilization alone or mixing with the pure diesel at different proportion. In the present work a diesel engine type (FIAT) , four cylinder, variable speed, direct injection was operated by sunflower oil methyl ester , biodiesel at different blend ratio . five different ratio of biodiesel blends 10%, 20%, 30%, 40%, and 50% by volume is used in this study and compared with using of pure diesel at variable loads and variable engine speed. The effect of biodiesel …
Removal Of Iron From Produced Water Using Silica Adsorbent Material, Zamen Mekhelf, Akeel Subhi, Ramzy Hamied
Removal Of Iron From Produced Water Using Silica Adsorbent Material, Zamen Mekhelf, Akeel Subhi, Ramzy Hamied
Engineering and Technology Journal
The removal of Iron from produced water using adsorbent materials is taking a space of attention from the perspective of researchers. In this work, the characterization of chemically modified silica used as Iron ions adsorbent using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), laser granularity instrument was performed. The point of zero charge (PZC) of modified silica was determined using titration method. Different parameters were used to better approach Iron removal. These parameters are 0.2 and 0.4 mg/l modified silica adsorbent dose, 30-180 min adsorption time and pH values of 4-10. The results showed that modified silica exhibited …
Optimization Of Plasma Cutting Parameters On Dimensional Accuracy And Machining Time For Low Carbon Steel, Sami Hamood, Vian Najm
Optimization Of Plasma Cutting Parameters On Dimensional Accuracy And Machining Time For Low Carbon Steel, Sami Hamood, Vian Najm
Engineering and Technology Journal
This work aims to study the influence of plasma arc cutting parameters on dimensional accuracy and machining time for mild steel (1010) material with the thickness (4 mm). Selected three cutting parameters (arc current, cutting speed, and arc distance) or the experimental work. 12 tests have been performed at each test one parameter has been changed with four various levels and other parameters are constant. The influence of the cutting parameters on response results (dimensional accuracy and machining time) have been studied and analyzed by using response surface methodology (RSM) using the second-order model and main effect plot have been …
Prediction Of Surface Roughness And Optimization Of Cutting Parameters In Cnc Turning Of Rotational Features, Yousif Shounia, Tahseen Abaas, Raed Shwaish
Prediction Of Surface Roughness And Optimization Of Cutting Parameters In Cnc Turning Of Rotational Features, Yousif Shounia, Tahseen Abaas, Raed Shwaish
Engineering and Technology Journal
This research presents a model for prediction surface roughness in terms of process parameters in turning aluminum alloy 1200. The geometry to be machined has four rotational features: straight, taper, convex and concave, while a design of experiments was created through the Taguchi L25 orthogonal array experiments in minitab17 three factors with five Levels depth of cut (0.04, 0.06, 0.08, 0.10 and 0.12) mm, spindle speed (1200, 1400, 1600, 1800 and 2000) r.p.m and feed rate (60, 70, 80, 90 and 100) mm/min. A multiple non-linear regression model has been used which is a set of statistical extrapolation processes to …
Improve The Micro-Hardness Of Single Point Incremental Forming Product Using Magnetic Abrasive Finishing, Baqer Ahmed, Saad Shather, Wisam Hamdan
Improve The Micro-Hardness Of Single Point Incremental Forming Product Using Magnetic Abrasive Finishing, Baqer Ahmed, Saad Shather, Wisam Hamdan
Engineering and Technology Journal
In this paper the Magnetic Abrasive Finishing (MAF) was utilized after Single Point Incremental Forming (SPIF) process as a combined finishing process. Firstly, the Single Point Incremental forming was form the truncated cone made from low carbon steel (1008-AISI) based on Z-level tool path then the magnetic abrasive finishing process was applied on the surface of the formed product. Box-Behnken design of experiment in Minitab 17 software was used in this study. The influences of different parameters (feed rate, machining step size, coil current and spindle speed) on change in Micro-Vickers hardness were studied. The maximum and minimum change in …
Preparation And Study Of Flexural Strength And Impact Strength For Hybrid Composite Materials Used In Structural Applications, Teeb Mohameed, Sihama Salih, Wafaa Salih
Preparation And Study Of Flexural Strength And Impact Strength For Hybrid Composite Materials Used In Structural Applications, Teeb Mohameed, Sihama Salih, Wafaa Salih
Engineering and Technology Journal
Many of the polymeric materials used for structural purposes have weak mechanical properties, these characteristics can therefore be improved by preparing a hybrid laminar composite. In this work use melting mixing method using screw extruder to prepare sheets of polymer blends and nanocomposites based on polymer blends, and using a hot hydraulic press machine to prepared hybrid laminates composites. Two groups of hybrid laminar composites were prepared, the first group is consist of [((94%PP: 5%PMMA: 1 %( PP-g-MA)): 0.3% ZrO2): 6%KF and 8%KF] and the second group is [((94%PP: 5%UHMWPE: 1 %( PP-g-MA)): 0.3% ZrO2): 6%KF and 8%KF]. The results …