The Influence of Magnesia Addition and Sintering Temperature on The Properties of Synthesized Electrical Porcelain
The Influence of Magnesia Addition and Sintering Temperature on The Properties of Synthesized Electrical Porcelain

Fadhil A. Chyad; Fadhaa G. Salem; Innam W. Waten; Zahraa F.Attiya

Volume 33, 2A , February 2015, Page 285-293

https://doi.org/10.30684/etj.33.2A.1

Abstract
  The influence ofmagnesia (MgO) content at different sintering temperatures on the physical and dielectric properties of synthesized electrical porcelain was investigatied.Feldspar is ...  Read More ...
Design of RF Power Amplifiers Using Parallel-Series Power Combining Transformers
Design of RF Power Amplifiers Using Parallel-Series Power Combining Transformers

Suhad. H. Jasim; Ahmed S. Ezzulddin

Volume 33, 2A , February 2015, Page 294-307

https://doi.org/10.30684/etj.33.2A.2

Abstract
  This paper presents the design of a one watt-level RF CMOS Power Amplifier (PA) based on power combining transformers PSCT in 0.13 µm technology using ADS 2011.10. The PA incorporates ...  Read More ...
An Automated Optimization Technique of a MSPA for Broadband Communication
An Automated Optimization Technique of a MSPA for Broadband Communication

Ali Owda Abid Noor

Volume 33, 2A , February 2015, Page 308-319

https://doi.org/10.30684/etj.33.2A.3

Abstract
  In this research paper, an automated design technique is used to optimize the variables of a microstrip patch antenna (MSPA), for reliable broadband communication systems. The method ...  Read More ...
Effect of Degassing Process of Squeeze Casting Aluminum Alloy on Tensile Strength Under Different Pressures
Effect of Degassing Process of Squeeze Casting Aluminum Alloy on Tensile Strength Under Different Pressures

Hussain J. Al-alkawi; Dhafir S. Al-Fattal; Samih K. Al-najjar

Volume 33, 2A , February 2015, Page 320-330

https://doi.org/10.30684/etj.33.2A.4

Abstract
  Degassing technique currently applied to cast aluminum alloys due to its technological and economic advantages. The present work aimed to study the effect of degassing technique of ...  Read More ...
Synthesis and Optimization of Nisin-Silver Nanoparticles at Different Conditions
Synthesis and Optimization of Nisin-Silver Nanoparticles at Different Conditions

Qusay J.Rasheed

Volume 33, 2A , February 2015, Page 331-341

https://doi.org/10.30684/etj.33.2A.6

Abstract
  Silver nitrate and commercial sigma Nisin were used to synthesize Nisin-Silver nanoparticles; different concentrations of Nisin at different pH conditions were used to optimize the ...  Read More ...
Experimental Study of the Thermal Contact Resistance in Fin and Tube
Experimental Study of the Thermal Contact Resistance in Fin and Tube

Ahmed A. M. Saleh; Abd al-satar Hamid Hussein

Volume 33, 2A , February 2015, Page 342-349

https://doi.org/10.30684/etj.33.2A.7

Abstract
  In this paper, experimental study has been done to show the effect of the Thermal Contact Resistance (1/hc) in fin and tube. Three types of fin-tube design Embedded, Welded and L-footed ...  Read More ...
Tool Path Generation for CNC Milling Based on STL File
Tool Path Generation for CNC Milling Based on STL File

Nadia Sami Hasan; Laith Abdullah Mohammed

Volume 33, 2A , February 2015, Page 350-361

https://doi.org/10.30684/etj.33.2A.8

Abstract
  This paper proposes and develops algorithms to read (STL) files and extract engineering entities required in CNC milling processes. The proposed algorithms are dependent on some mathematical ...  Read More ...
One- Dimensional Cutting Stock Problem in Al- Mansour Company
One- Dimensional Cutting Stock Problem in Al- Mansour Company

Sawsan Sabeeh; Salam Qaddoori Dawood

Volume 33, 2A , February 2015, Page 362-371

https://doi.org/10.30684/etj.33.2A.9

Abstract
  When short items are being cut out from long objects, the One- Dimensional Cutting Stock Problem (1D-CSP) is being appeared and caused increment in wastage material amounts, so the ...  Read More ...
Experimental Investigations of Hole - EDM to Optimize ElectrodeWear through Full Factorial of Design of Experiment
Experimental Investigations of Hole - EDM to Optimize ElectrodeWear through Full Factorial of Design of Experiment

Shukry H. Aghdeab; Laith A. Mohammed

Volume 33, 2A , February 2015, Page 372-379

https://doi.org/10.30684/etj.33.2A.10

Abstract
  Electrical discharge machining (EDM) is a process where the material removal of the workpiece is achieved through high frequency sparks between the tool (electrode) and the workpiece ...  Read More ...
Application of Adaptive Neuro-Fuzzy Inference System for Prediction of Surface Roughness in Incremental Sheet Metal Forming Process
Application of Adaptive Neuro-Fuzzy Inference System for Prediction of Surface Roughness in Incremental Sheet Metal Forming Process

Aws K. Ibrahim; Wisam K. Hamdan

Volume 33, 2A , February 2015, Page 380-399

https://doi.org/10.30684/etj.33.2A.11

Abstract
  In manufacturing processes, surface finish of a product is very crucial in determining the quality. Therefore, the surface quality including the surface roughness is still the most ...  Read More ...
Simulation & Evaluation of (OADM) Based on Bragg Gratings and 3dB MMI Couplers
Simulation & Evaluation of (OADM) Based on Bragg Gratings and 3dB MMI Couplers

Aied K. Mohammed; Raheel J. Hassoon

Volume 33, 2A , February 2015, Page 400-414

https://doi.org/10.30684/etj.33.2A.12

Abstract
  In this paper, an approach has been proposed to design an (OADM) made in silica- on silicon waveguide by combining Bragg gratings (BGs) and 2x2 3dB multimode interference couplers (3dB ...  Read More ...
Effect of Post-Buckling on The Stiffness and Stress of Plate
Effect of Post-Buckling on The Stiffness and Stress of Plate

Hani Aziz Ameen; Kayser Aziz Ameen; Ibtissam Mahdi shihab

Volume 33, 2A , February 2015, Page 415-430

https://doi.org/10.30684/etj.2015.101910

Abstract
  This paper presents a theoretical investigation of post and pre-buckling of the simply supported plate. The effect of post and pre buckling on the stiffness of plate is determined. ...  Read More ...
Analysis of Traffic Operation for AL-Kafa’at Signalized Intersection in Al-Kut City
Analysis of Traffic Operation for AL-Kafa’at Signalized Intersection in Al-Kut City

Abbas Z. Khalaf; Hasan Hamodi; Mohammed Riyadh

Volume 33, 2A , February 2015, Page 431-439

https://doi.org/10.30684/etj.33.2A.14

Abstract
  Traffic Studies Aim (Traffic analysis) to estimate some of the important indicators to determine the level of service (LOS) at intersections in the cities. That's where the increase ...  Read More ...
Improvement of Motor Performance By Applying 6-Sigma (Dmadv)
Improvement of Motor Performance By Applying 6-Sigma (Dmadv)

May George Kassir; Shatha Mouayad Mahdi

Volume 33, 2A , February 2015, Page 440-450

https://doi.org/10.30684/etj.33.2A.15

Abstract
  Highly competitive markets justify the use of advanced technologies and methods to improve product’s quality and sales, which are the survival of any organization involved in ...  Read More ...
Prediction of Bead Width In Submerged ArcWelding of Low Carbon Steel (AISI 1005)
Prediction of Bead Width In Submerged ArcWelding of Low Carbon Steel (AISI 1005)

Husham Jawad Kadhim; Ahmed Ali Akbar Akbar

Volume 33, 2A , February 2015, Page 451-462

https://doi.org/10.30684/etj.33.2A.16

Abstract
  This paper used Taguchi technique to determine the optimal SAW parameters, an effort has been made to study the effect of SAW process parameters (current I, voltage V, speed S) on the ...  Read More ...
Groundwater Quality Assessment in Urban Area of Baghdad, Iraq, Using Multivariate Statistical Techniques
Groundwater Quality Assessment in Urban Area of Baghdad, Iraq, Using Multivariate Statistical Techniques

Alhassan H. Ismail; Muntasir A.H; Reem J. Channo

Volume 33, 2A , February 2015, Page 463-476

https://doi.org/10.30684/etj.33.2A.17

Abstract
  An attempt has been made to assess the overall groundwater quality and identify major variables affecting the groundwater quality in the urban area of Baghdad, Iraq. Groundwater samples ...  Read More ...
Forecasting the Final Cost of Iraqi Public School Projects Using Regression Analysis
Forecasting the Final Cost of Iraqi Public School Projects Using Regression Analysis

Zeyad S. M. Khaled; Qais Jawad Frayyeh; Gafel Kareem Aswed

Volume 33, 2A , February 2015, Page 477-486

https://doi.org/10.30684/etj.33.2A.18

Abstract
  The actual final cost of public school building projects, like other construction projects, is unknown to the owner till the final account statement is prepared. An attempt to predict ...  Read More ...
Different Shapes of Carbon Nanotubes via Water Assisted Chemical Vapor Deposition
Different Shapes of Carbon Nanotubes via Water Assisted Chemical Vapor Deposition

Kahtan Kalaf Al-Khazraji; Ali Hussain Ataiwi; Mayyadah S. Abed Al-Fatlawi

Volume 33, 2A , February 2015, Page 487-499

https://doi.org/10.30684/etj.33.2A.19

Abstract
  Carbon nanotubes with different shapes have been prepared using water assisted chemical vapor deposition technique (WA-CVD). Different thicknesses of nickel layers were sputtered on ...  Read More ...
Effect of Practical Curing Methods on the Properties of Roller Compacted Concrete
Effect of Practical Curing Methods on the Properties of Roller Compacted Concrete

Hisham K. Ahmed; Intesar Kadhim Gata

Volume 33, 2A , February 2015, Page 500-511

https://doi.org/10.30684/etj.33.2A.20

Abstract
  Roller Compacted Concrete (RCC) is a technology characterized mainly by the use of rollers for compaction. This construction method permits considerable reduction in costs and construction ...  Read More ...
Pool Boiling Heat Transfer Using Nanofluids
Pool Boiling Heat Transfer Using Nanofluids

Jamal M.Ali; Balasim Ahmed Abid; Kheria M. Essa

Volume 33, 2A , February 2015, Page 512-525

https://doi.org/10.30684/etj.33.2A.5

Abstract
  Nucleate pool boiling regime can be considered as one of the most effective ways to make a viable great amount of heat exchange in a relatively small area. To investigate the characteristics ...  Read More ...