Engineering and Technology Journal

Economic Energy Consumption Using Tromb Wall Without Openings By Solar Radiation

Volume 29, Issue 8 , June 2011, Page 374-387

Abstract

The present study deals with the prediction and distribution of temperature of air that is contained in an enclosure (test room). The test room is equipped with a concrete thermo storage ... Read More ...

The Use of Toluene to Improve the Mechanical, Thermal, Electrical Properties of Polymer Blend

Volume 29, Issue 8 , June 2011, Page 388-396

https://doi.org/10.30684/ etj.29.8.18

Abstract

This study was performed to investigate the effect of addition the toluene solvent to prepare polymeric blends that are used in the tile manufacture. The first blend was prepared by ... Read More ...

Study The Environmental Effect on The Properties of (Epoxy / Rubber) Composite

Volume 29, Issue 8 , June 2011, Page 397-407

https://doi.org/10.30684/ etj.29.8.19

Abstract

This study includes preparation of polymer blend consisting of epoxy resin with NBR (Natural Butadiene Rubber) with70:30 percentage respectively, and this blend is used as a matrix ... Read More ...

Erosen In Architecture

Volume 29, Issue 8 , June 2011, Page 408-429

https://doi.org/10.30684/ etj.29.8.20

Abstract

The Architectural movements have adopted many strategies to create architectural outcomes reflecting their thoughts, goals, concepts, and their special trends. Among these strategies ... Read More ... The Architectural movements have adopted many strategies to create architectural outcomes reflecting their thoughts, goals, concepts, and their special trends. Among these strategies is Erosen which has been tackled by different fields of study (artistic and architectural) to describe the characteristics of their physical outcomes, but it has not received sufficient investigation and analysis in the different architectural trends and this has triggered the need to carry out the current research. The research problem discusses the issue that there is no sufficient theoretical knowledge concerning the strategy of Erosen, the mechanisms of embodying it, the degree of its realization in the architectural outcome of both the modern and postmodern trends, and the nature of variance between them in the way of achieving Erosen .Thus, the present research aims at investigating and explaining this variance in details. As to the methodology the research, it has been represented by a number of steps: First, the research tried to build up a theoretical framework for Erosen in architecture that clarifies its variables and detailed indicators, Second, built he research hypotheses have been stated and the samples have been selected for both the modern and post-modern trends for the purpose of application and finally the results have been analyzed and the final conclusion have identified. The research has reached the following conclusion that there is a variance between the modern and post-modern trends in the way of applying Erosen of their architectural outcomes despite their similarity shown in the adoption of Erosen as a strategy to generate the outcome ,but the variance clearly has been clearly shown in the method , style and the degree of achieving Erosen. While modernism has focused on the explicit Erosen and largely and excessively achieving it, postmodernism has focused on Erosen the content in a higher degree and achieving it in a moderate degree along with the adoption of both trends of certain mechanisms to embody the Erosen strategy within their outcomes and this is due to the variance between the two trends in the intellectual attitudes and objectives.

A Deactivation Correlation for Platinum Y-Zeolite in n-Hexane Isomerization

Haiyam Mohammed A. Al-Raheem

Volume 29, Issue 8 , June 2011, Page 1451-1462

https://doi.org/10.30684/ etj.29.8.1

Abstract

The objective of the present work is to realize the kinetic modeling regarding deactivation of Pt-HY zeolite and monitor the isomerization reaction of n-hexane. The catalyst has been ... Read More ...

One Parameter Composite Semigroups of Linear Bounded Operators in Strong Operator Topology of Schatten Class Cp

Samir Kasim Hassan; Al-Taie M; Al-Malki Anam; Al-Attar Abeer; Mustafa Khaleel Ismael; Fatema Ahmed Sadeq; Radhi A .Zboon; Jehad R.Kider; Samir K .Hassan; Hussain J. M. Alalkawi; Raad H. Majid; Rawaa A. Alomairy; Luma Abdul Ghani Zghair; Hadia Kadhim J.Al-Ogili; Assifa M. Mohamad; Abbas Sheyaa Alwan; Haider L. Aneed; Assim H Yousif; Salema Sultan Salman; Abbas Hussien Miry; Abduladhem A.Ali; Mohammed Zeki Al-Faiz; Sabah N. mahmood; Khansaa Dawood Selman; Shaymaa Tareq Kadhim

Volume 29, Issue 8 , June 2011, Page 1463-1470

https://doi.org/10.30684/ etj.29.8.2

Abstract

For semigroups of linear bounded operators on Hilbert spaces, the problem of being in Cp , 0 Keywords Read More ...

Manufacture of Light Weight Ceramic Bodies as Thermal Insulator From Local Material

Al-Taie M; Al-Malki Anam; Al-Attar Abeer

Volume 29, Issue 8 , June 2011, Page 1471-1481

https://doi.org/10.30684/ etj.29.8.3

Abstract

The research work covers a study of the feasibility of producing lightweight ceramic thermal insulation bodies used for lining the furnaces by adding saw dust and AlF3 to the Dewechla ... Read More ...

Corrosion Resistance of Aluminum Alloy 7020-T6 in Sea Water

Mustafa Khaleel Ismael

Volume 29, Issue 8 , June 2011, Page 1482-1490

https://doi.org/10.30684/ etj.29.8.4

Abstract

The present work is aimed to investigate the effect of heat treatment on corrosion resistance of Al-alloy 7020-T6 in sea water, the specimens which manufactured by (1.5*1.5*0.2) cm, ... Read More ...

A New Approach for Finding The Coefficients and Roots of The Ehrhart Polynomial of A Cyclic Polytope With Some Properties

Fatema Ahmed Sadeq

Volume 29, Issue 8 , June 2011, Page 1491-1496

https://doi.org/10.30684/ etj.29.8.5

Abstract

The aim of this work is to give a simple description of a cyclic polytope and a new approach for finding the coefficient of its Ehrhart polynomials using Pascal triangles. Theorem for ... Read More ...

Solvability of Semilinear Initial Value Perturbed Control Problems with Unbounded Control Operators

Radhi A .Zboon; Jehad R.Kider; Samir K .Hassan

Volume 29, Issue 8 , June 2011, Page 1497-1508

https://doi.org/10.30684/ etj.29.8.6

Abstract

In this paper the local existence and uniqueness of the mild solution to some operator semi-linear initial value control problem were studied and developed by using the theory of perturbation, ... Read More ...

Fatigue of Cu 65400 Alloy under Laser treatment

Hussain J. M. Alalkawi; Raad H. Majid; Rawaa A. Alomairy

Volume 29, Issue 8 , June 2011, Page 1509-1516

https://doi.org/10.30684/ etj.29.8.7

Abstract

Fatigue tests were done to determine the S-N curves for Cu 65400 alloy specimens .The effect of laser shotting on the fatigue properties were investigated with stress ratio R=-1 at ... Read More ...

Behavior of Plain and High Performance Polypropylene Fiber Concrete Subjected to Elevated Temperatures

Luma Abdul Ghani Zghair

Volume 29, Issue 8 , June 2011, Page 1517-1535

https://doi.org/10.30684/ etj.29.8.8

Abstract

The aim of this work is to determine the residual compressive strength and splitting tensile strength after exposure to an elevated temperature (between100 to 500 C ◌ْ ) of plain ... Read More ... The aim of this work is to determine the residual compressive strength and splitting tensile strength after exposure to an elevated temperature (between100 to 500 C ◌ْ ) of plain and polypropylene fiber reinforced concrete (PPFRC) in comparison with specimens exposed to ordinary temperature 25C ◌ْ . High – performance concrete mixes were produced by using high rang reducing agent superplasticizer (SP) and 10% high reactivity metakaoline (HRM) as a partial replacement by weight of cement (350)Kg/m3 . A single concrete mix with HRM, SP and four PPF contents of (0.25, o.5, o.75 and 1%) by volume were adopted. The workability of the concrete was kept constant ( slump 100 ± 5mm ).Each group of specimens ( plain and PPFRC ) was heated to a specified temperature and kept at the temperature for one hour before being gradually cooled to room temperature and then they were tested . The results show at ordinary temperatures 25 C ◌ْ, the addition of fiber volume fraction (VF%) of (0.25%) increases the compressive ( 20.6% ) comparable to HPC without fiber . While the addition of ( 0.5 , 0.75 and 1% ) of polymer fibers , the compressive strength decreased (12.6 , 19 and 33%) respectively comparable to HPC without fiber . On the other hand the addition of (VF%) of (0.25) increased splitting tensile strength ( 15%) comparable to HPC without fiber . while the addition of fiber volume fraction (VF%) of (0.5 ) increased splitting tensile strength by a percentage which is lower than that in specimens with VF% of 0.25 , the increase in splitting tensile strength was ( 6%) comparable to HPC without fiber at ordinary temperatures The results also shows that , when (1% ) fibers was used , the splitting tensile strength decreased ( 10.8%) in comparable to HPC without fiber At elevated temperature the results show an appreciable decrease in compressive strength and splitting tensile strength after exposure to temperature higher than 300 C ◌ْ of both plain and PPFRC Specimens containing PPF ( 0.25 , 0.5 , and 0.75 %) the percentage of reduction in splitting tensile strength is lower than that in HPC specimens ( without fibers ) after exposure to a temperature ( 500 ,300 and 100 C ◌ْ ) comparable to normal temperature 25C ◌ْ .While specimen containing PPF ( 1% ) the percentage of reduction in splitting tensile strength was higher than specimen without PPF after exposure to a similar temperature .On the other hand , specimens containing PPF ( 0.25 , 0.5 , 0.75 and 1 %) the percentage of reduction in compressive strength is higher than that in HPC specimens ( without fibers ) after exposure to a temperature (500 ,300 and 100 C ◌ْ). comparable to normal temperature 25C ◌ْ

Effect of Thickness to the Structure Properties of CdO Thin Films

Hadia Kadhim J.Al-Ogili

Volume 29, Issue 8 , June 2011, Page 1536-1544

https://doi.org/10.30684/ etj.29.8.9

Abstract

In this paper CdO thin films were prepared by using chemical bath deposition method. Three different thicknesses of CdO films (84.1nm, 165.1nm, 194.23nm) were used .x-ray diffraction ... Read More ...

Effectiveness of Naphthalene in Grain Refinement of Commercially Pure Aluminum and Zinc Ingot Castings

Assifa M. Mohamad

Volume 29, Issue 8 , June 2011, Page 1545-1553

https://doi.org/10.30684/ etj.29.8.10

Abstract

It is well established that the properties of cast metals are greatly improved by refinement of their grain size. The method employed in this study for the refinement of grain size ... Read More ...

Effect of Normalizing Process on Mechanical Properties of Submerged-arc Weldment

Abbas Sheyaa Alwan

Volume 29, Issue 8 , June 2011, Page 1554-1562

https://doi.org/10.30684/ etj.29.8.11

Abstract

Submerged arc welding is carried out and efficient metal- joining process widely used in great importance in many industrial applications, structures of ships, storage tanks and agriculture ... Read More ...

Evaluation of Aerodynamic Coefficients of High Temperature Gas Turbine Cascade of Cooled Blade

Haider L. Aneed; Assim H Yousif

Volume 29, Issue 8 , June 2011, Page 1563-1579

https://doi.org/10.30684/ etj.29.8.12

Abstract

The aerodynamic force coefficients of five linear cascade of existing film cooling turbine blades are evaluated numerically. The blade is geometrically identical to the first rotor ... Read More ...

Study the Effect of Transmission Cable Resistance on Tv – Satellite Image Quality

Salema Sultan Salman

Volume 29, Issue 8 , June 2011, Page 1580-1596

Abstract

The noise of satellite broadcasting images was statistically analyzed as a function of values of resistant put in video signal transmission cable in images adopted in the study. This ... Read More ...

GUI Simulation for Movement of Human Arm Driven by EMG Signal

Abbas Hussien Miry; Abduladhem A.Ali; Mohammed Zeki Al-Faiz

Volume 29, Issue 8 , June 2011, Page 1597-1609

https://doi.org/10.30684/ etj.29.8.14

Abstract

This work presents a simulation methodology applied to a human arm. It is aimed to allow the human-assisting manipulators to perform complex movement based on electromyography (EMG) ... Read More ...

Effect of Laser Surface Treatment on Mechanical Properties of CK45 Steel

Sabah N. mahmood; Khansaa Dawood Selman

Volume 29, Issue 8 , June 2011, Page 1610-1618

https://doi.org/10.30684/ etj.29.8.15

Abstract

The research aims to study the effect of laser surface treatment on mechanical properties of CK45 steel which is widely used in Bolts, Axles Various,Connecting Rods and Hydraulic clamps. ... Read More ...

Studying the Behavior of Axially Loaded Single Pile in Clayey Soil with Cavities

Shaymaa Tareq Kadhim

Volume 29, Issue 8 , June 2011, Page 1619-1630

https://doi.org/10.30684/ etj.29.8.16

Abstract

This paper deals with the interaction between cavities and adjacent axially loaded pile in clayey soil using the three dimensional finite element program (ANSYS 11.0).Three dimensional ... Read More ...

Volume & Issue: Volume 29, Issue 8, June 2011, Page 374-1630

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