Effect of cooling rate of steel ( 25 Cr Mo4 ) on its hardness and microstructure
Effect of cooling rate of steel ( 25 Cr Mo4 ) on its hardness and microstructure

Jassim Mohammed. Khadir

Volume 27, Issue 11 , August 2009, Page 348-363

https://doi.org/10.30684/etj.27.11.15

Abstract
  In this work , structural low – alloyed steel (25 Cr Mo4 ) was melted in mediumfrequency coreless induction furnace of (60) kgs . capacity , lined with highalumina lining powder ...  Read More ...
Reliability Measurement for Rotary Kiln Cement Kubaysa Factory
Reliability Measurement for Rotary Kiln Cement Kubaysa Factory

Sawsan Sabih Abd-Ali; Saleh Jaafar. Fendi; Satar Abdul-Mutalq

Volume 27, Issue 11 , August 2009, Page 364-380

https://doi.org/10.30684/etj.27.11.16

Abstract
  "Reliability" is one of engineering indicators for describing theperformance of an item or system by probability functions. Reliability is defined asthe probability that an item or ...  Read More ...
Night Illumination Design on Building aid the Architectural Creativity
Night Illumination Design on Building aid the Architectural Creativity

Zainab Hassan Raouf; Rana Mazin. Mahdi

Volume 27, Issue 11 , August 2009, Page 381-393

https://doi.org/10.30684/etj.27.11.17

Abstract
  Recent trends in night illumination designs for building have experienced specialroles in the architectural compositions. These roles were the prime factors in enhancingthe characters ...  Read More ...
Performance and design changes accompanying the replacing of an old cooling fluid(R12) with one which is safe on the Ozone layer ( R134a) in the cooling system of a small water cooler
Performance and design changes accompanying the replacing of an old cooling fluid(R12) with one which is safe on the Ozone layer ( R134a) in the cooling system of a small water cooler

Mohammed Hassan. Jabal

Volume 27, Issue 11 , August 2009, Page 394-407

https://doi.org/10.30684/etj.27.11.18

Abstract
  Due to the spreading of cooling equipments that works with old coolingfluids(Freon) in the community,and because of the bad effects of these (Freon)incase of their spreading on the ...  Read More ...
Effect of Zirconia Addition on Some Physical and Mechanical Properties of Porcelain
Effect of Zirconia Addition on Some Physical and Mechanical Properties of Porcelain

Mohammed Haider. Al-Taie; Fadhel Attia. Jiyad; Hussein Alaa. Jaber

Volume 27, Issue 11 , August 2009, Page 408-416

https://doi.org/10.30684/etj.27.11.19

Abstract
  This research includes the study of the effect of zirconia (ZrO2) additionin a different weight percentages (5,10,15,20)% to porcelain samples formedfrom (Duekhla Kaolin, Ardima Sand, ...  Read More ...
Determination of Yield Loci for (Al-2%Cu) sheets
Determination of Yield Loci for (Al-2%Cu) sheets

Abbas Abdullah Ahmed

Volume 27, Issue 11 , August 2009, Page 417-422

https://doi.org/10.30684/etj.27.11.20

Abstract
  This study concerns on the plastic behaviour of (Al-2%Cu) sheets undersimple tension, plane strain tension and balanced biaxial tension. Experimentalyield loci were extracted based ...  Read More ...
A Block Compression Method for Fingerprint Image Storing
A Block Compression Method for Fingerprint Image Storing

Salwa A. Al-alagha

Volume 27, Issue 11 , August 2009, Page 2165-2179

https://doi.org/10.30684/etj.27.11.1

Abstract
  Storage of fingerprint image databases needs allocation of huge secondarystorage devices. To reduce the increasing demand on storage space, efficient datacompression techniques are ...  Read More ...
Partition Method for Solving Boundary Value Problem Using B-Spline Functions
Partition Method for Solving Boundary Value Problem Using B-Spline Functions

Bushra E. Kashem

Volume 27, Issue 11 , August 2009, Page 2180-2188

https://doi.org/10.30684/etj.27.11.2

Abstract
  This paper is concerned with the approximated solution of linear two-pointsboundary value problem (LTPBVP) using Partition method with the aid of B-Splinefunctions as basis functions. ...  Read More ...
Secure and Energy Efficient Key Management Protocol for Ad hoc Sensor Network
Secure and Energy Efficient Key Management Protocol for Ad hoc Sensor Network

Dhafer R. Zaghar; Bassim Abdulbaki Juma; Yaarob M. Nafel

Volume 27, Issue 11 , August 2009, Page 2189-2204

https://doi.org/10.30684/etj.27.11.3

Abstract
  Recent advances in wireless communications and electronics have helped to develop sensor nodes which are low-cost, low-power, multifunctional, small in size and communicate in short ...  Read More ...
Studying Curve Interpolator for CNC System
Studying Curve Interpolator for CNC System

Abbas M. Jabber Al-Fnzi; Laith A. Mohammed; Maan Aabid Tawfiq

Volume 27, Issue 11 , August 2009, Page 2205-2222

https://doi.org/10.30684/etj.27.11.4

Abstract
  This thesis focuses on developing algorithm to calculate best length line segments in (u) and (w) directions. By of tool paths for free form surfaces based on the required accuracy ...  Read More ...
Electrical And Thermal Properties Of Epoxy Resin Filled With Carbon Black
Electrical And Thermal Properties Of Epoxy Resin Filled With Carbon Black

Adnan A. Abdul Razak; Najat j. Salah; Waffa Abdul Kazem

Volume 27, Issue 11 , August 2009, Page 2223-2232

https://doi.org/10.30684/etj.27.11.5

Abstract
  Thermal and electrical conductivity of an insulating polymer can be achieved bydispersing conducting particles (e.g., metal, carbon black) in the polymer. The resulting materialsare ...  Read More ...
Environmental Effect on Fatigue and Lifetime of Silica Optical Fibers
Environmental Effect on Fatigue and Lifetime of Silica Optical Fibers

Khalid Sadiq Rida; Tairq AbdualWahab

Volume 27, Issue 11 , August 2009, Page 2233-2248

https://doi.org/10.30684/etj.27.11.6

Abstract
  Fiber optics as a transmission lines using for transmitting the signals and datainformation at minimum losses. It is using with modem communication which has thehigh immunity to' electromagnetic ...  Read More ...
Multidimensional Graphics Implementation Using DirectX API Class Library
Multidimensional Graphics Implementation Using DirectX API Class Library

Jumana Basheer Muhammed; Anaam s. Nasser

Volume 27, Issue 11 , August 2009, Page 2249-2258

https://doi.org/10.30684/etj.27.11.7

Abstract
  Several techniques or capabilities are provided by DirectX, each of whichcan add effects on the designed graphics by using special functions in theapplication or program that written ...  Read More ...
Taguchi Approach to Optimize Pack Aluminization Parameters in Carbon Steel Using MINITAB13
Taguchi Approach to Optimize Pack Aluminization Parameters in Carbon Steel Using MINITAB13

Abbas Khammas Hussein

Volume 27, Issue 11 , August 2009, Page 2259-2272

https://doi.org/10.30684/etj.27.11.8

Abstract
  Pack aluminization has been rapidly developed and widely used in many fieldsdue to its superior properties of coating. Surface is the only part of the componentwhich has to coexist ...  Read More ...
A Comparison Between The Wear Rate Behavior Of Polyester Reinforced By Glass And Kevlar Fibers
A Comparison Between The Wear Rate Behavior Of Polyester Reinforced By Glass And Kevlar Fibers

Jamal Jalal Dawood

Volume 27, Issue 11 , August 2009, Page 2273-2285

https://doi.org/10.30684/etj.27.11.9

Abstract
  In this research the wear rate of the polyester reinforced by chopped glassfibers and chopped Kevlar fibers with length (1-2.5 mm) and weight fraction (4, 8, 12,16 WT %) has been investigated. ...  Read More ...
Physical Properties of MOS Porous Silicon Detector Fabricated under RTO Method
Physical Properties of MOS Porous Silicon Detector Fabricated under RTO Method

Alwan M. Alwan; Wafaa K. Khalaf; Narges Z. Abdulzahra

Volume 27, Issue 11 , August 2009, Page 2286-2291

https://doi.org/10.30684/etj.27.11.10

Abstract
  In this research we studying the sensitivity of a porous silicon photo detector, wefound it improved through rapid thermal oxidation processes. Under our optimumpreparation conditions, ...  Read More ...
Comparison Study between the Use of Plastic and Concrete Pipes for Redesign and Reconstruction of Sanitary Sewer Network in Baghdad City (Hay Al Karadda –Sections 903-905)
Comparison Study between the Use of Plastic and Concrete Pipes for Redesign and Reconstruction of Sanitary Sewer Network in Baghdad City (Hay Al Karadda –Sections 903-905)

Shaimaa Taleb Kadhum

Volume 27, Issue 11 , August 2009, Page 2292-2304

https://doi.org/10.30684/etj.27.11.11

Abstract
  Over the recent years, the emphasis on sewerage has increasinglyswitched from provision of new services to maintenance of existing service atacceptable levels. As a consequence the ...  Read More ...
Analysis and design of PID Control System for Active Magnetic Bearings
Analysis and design of PID Control System for Active Magnetic Bearings

Adil H. Ahmed; Thamir M. Abdul Wahab

Volume 27, Issue 11 , August 2009, Page 2305-2320

https://doi.org/10.30684/etj.27.11.12

Abstract
  Active magnetic bearings (AMB) are unstable by their nature and are used in veryhigh-speed applications, therefore the design and implementation of a suitable control systemfor such ...  Read More ...
Boundary Element Analysis of Capped Pile Groups
Boundary Element Analysis of Capped Pile Groups

Kais T. Shlash; Mohammed Y. Fattah; Madhat S. Al-Soud

Volume 27, Issue 11 , August 2009, Page 2321-2334

https://doi.org/10.30684/etj.27.11.13

Abstract
  The boundary element method (BEM) has become one of the most powerfulnumerical techniques which has already established itself within the scientificcommunity. The most striking feature ...  Read More ...
Growth Kinetics of Chemically Deposited CdO Thin Films
Growth Kinetics of Chemically Deposited CdO Thin Films

Selma Mohammed H. Al-Jawad; Hadia Kadhim J.Alogili

Volume 27, Issue 11 , August 2009, Page 2335-2344

https://doi.org/10.30684/etj.27.11.14

Abstract
  In this work CdO films were prepared by using chemical bath depositiontechnique where the cadmium nitrate salt was used as a source of cadmium ions.The effect of different bath parameters ...  Read More ...