Engineering and Technology Journal

Parametric Study on Intrinsic Reaction for Straight Run Heavy Naphtha Hydrodesulfurization over CoMo/Al2O3 Catalyst

Mohammad F. Abid; Mohammed K. Abdullah; Salah M. Ali

Volume 36, 2A , February 2018, , Page 146-153

https://doi.org/10.30684/etj.36.2A.5

Abstract

The present study aimed to investigate the intrinsic reaction of hydrodesulfurization (HDS) for a real Straight Run Heavy Naphtha (SRHN) over CoMo-S/Al2O3 catalyst in a fixed- bed reactor. ... Read More ...

Experimental Behavior of Self Compacting Concrete Corbels Strengthened with External CFRP

Sarmad Sh. Abdulqader; Basil Salah Al-Shathr; Ali Kh. Hasan

Volume 36, 2A , February 2018, , Page 154-162

https://doi.org/10.30684/etj.36.2A.6

Abstract

This research aims to study the influence of using Carbon Fiber Reinforced Polymer (CFRP) strips as an external strengthened and repairing material on the behavior of self-compacting ... Read More ... This research aims to study the influence of using Carbon Fiber Reinforced Polymer (CFRP) strips as an external strengthened and repairing material on the behavior of self-compacting concrete (SCC) Corbels. The experimental work involved testing twenty self-compacting concrete corbels specimens. The experimental work is divided into two parts; the first part consists of three groups to investigate the most effective direction, position, bonding type and amount of CFRP strips on the behavior of corbels and utilized it in practice, also to strengthen new variables that are investigated in the second part. Two groups in part one are strengthened with different numbers of inclined and horizontal direction of CFRP strips, while in the third group the specimens were strengthened with strips of CFRP having different directions and bond types to improve the strength capacity and behavior of corbels. This improvement is represented by increase cracking load by about (94)% and increase in their ultimate load capacity of strengthening corbels which varies from about (19 to 88)%. While the second part of experimental work included the following variables: shear span to effective depth ratio (a/d), amount of horizontal steel reinforcement stirrups and repaired damaged corbels. The reinforced concrete corbels in this part were strengthened and repaired by CFRP strips depending on optimum result that is produced from part one wherefrom position, direction and amount are considered. It was found for un-strengthened and strengthened corbels having same horizontal secondary reinforcement stirrups that when (a/d) ratio decreases from 0.65 to 0.4 causes increase in cracking and ultimate loads reach (55)% and (35.41)% respectively. For un-strengthened and strengthened corbels having same (a/d) ratio, it was found an increase in cracking load which varies from (6.66 to 34.78)% and from (18.18 to 52.63) % in ultimate load when horizontal secondary reinforcement stirrups are increased. It was also found repairing SCC corbels with CFRP strips causes an increase in ultimate load reaching up to (50)% with respect to un-strengthened specimens. From results it is concluded that strengthened or repaired corbels present stiffer load deflection response than corresponding un-strengthened corbel (control corbel).

Experimental Behavior of Hybrid Steel and Polypropylene Fiber Reinforced Concrete Deep Beam Containing Openings

Nabeel Al-Bayati; Noor Hadi

Volume 36, 2A , February 2018, , Page 163-171

https://doi.org/10.30684/etj.36.2A.7

Abstract

Twelve simple span reinforced concrete deep beams were tested under symmetrically two points top load to examine the effect of steel fiber and polypropylene fiber and influence of the ... Read More ...

Design and Analysis of American Sign Language Classifier Based on n-tuple Technique

Mahmuod AL-Muifraje; Thamir Saeed; Mosab A. Hassan

Volume 36, 2A , February 2018, , Page 172-178

https://doi.org/10.30684/etj.36.2A.8

Abstract

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 ... Read More ...

Experimental Study for the Effects of Crystalline Agents on Properties of Glass-Ceramic Coating

Ibtihal A. Mhmood; Ahmed A. Zainulabdeen; Jabbar H. Mohmmed

Volume 36, 2A , February 2018, , Page 179-184

https://doi.org/10.30684/etj.36.2A.9

Abstract

In this work, four series of glass-ceramic coatings were developed and applied by using the dipping technique to cast iron sheets. The influence of different types of crystallization ... Read More ...

Frequency Reconfigurable Monopole Antenna Using Switchable Slotted Triangular Radiators

Fayyadh H. Ahmed; Bayez K. Al-Sulaifanie

Volume 36, 2A , February 2018, , Page 185-195

https://doi.org/10.30684/etj.36.2A.10

Abstract

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 ... Read More ...

Stress Intensity Factor in Hollow Square Sections Using Extended Finite Element Method

Qusai T. Abdulwaha

Volume 36, 2A , February 2018, , Page 196-201

https://doi.org/10.30684/etj.36.2A.11

Abstract

Hollow sections are extensively used in structural applications due to its good mechanical properties relative to weight. The presence of cracks in structural member may lead to catastrophic ... Read More ...

Entropy Generation Minimization Theoretical Analysis for External Flow Around Horizontal Cylinder at low Reynold Number

Louay A. Mahdi

Volume 36, 2A , February 2018, , Page 202-206

https://doi.org/10.30684/etj.36.2A.12

Abstract

The minimization of entropy generation is a helpful method to design optimum thermal system, and find an expression for entropy generation at several ranges of Reynolds number for heat ... Read More ...

New Strategies for Associative Memories

Azad R. Kareem; Saja A. Talib

Volume 36, 2A , February 2018, , Page 207-212

https://doi.org/10.30684/etj.36.2A.13

Abstract

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 ... Read More ...

Sensor Network Based Animals Feeding and Milk Production Management System

Zena M. Faris; Muayad S. Croock

Volume 36, 2A , February 2018, , Page 213-222

https://doi.org/10.30684/etj.36.2A.14

Abstract

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 ... Read More ...

Influence of Spirals on the Behavior of Short RC Columns Strengthened by External CFRP

Kaiss F. Sarsam; Raid I. Khalel; Mohammed A. Hadi

Volume 36, 2A , February 2018, , Page 223-233

https://doi.org/10.30684/etj.36.2A.15

Abstract

An experimental study was carried out to investigate the behavior of normal strength reinforced concrete (RC) circular short columns strengthened by carbon fiber reinforced polymer ... Read More ...

Effect of Super Plasticizer on the Properties of Pre-cast Concrete Flags Reinforced by Steel Fibers and Including Slag

Qais J. Frieh; Bassam A. Aljabbar

Volume 25, Issue 10 , December 2007, , Page 337-352

https://doi.org/10.30684/etj.25.10.11

Abstract

This research has studied the possibility of optimizing some of the properties of the precast concrete flags by using by-products of steel fragments from the CNC machines and local ... Read More ... This research has studied the possibility of optimizing some of the properties of the precast concrete flags by using by-products of steel fragments from the CNC machines and local slag, the combined influence of these materials338with the water reducing agent. The local slag is produced by the blast furnace from the scrap as a raw material, which is called (steel slag). The local slag has a low activity as a cementicious material due to low content of glass since it has not been treated, and contains high ferrous ratio. The study includes the results of compressive and strength as well as transverse loading tests. Also, it includes the measurements of absorption on different curing durations of the reference concrete samples and concrete contains the metal and chemical additives, reinforced by steel fibers. This study has taken place by replacing the slag instead of fine aggregate, using ratios of (0, 10, 20, 30%) by weight of sand with the influence of steel fibers from the CNC by-products, using ratios of (0.5, 1.0, 1.5 %) by volume of the concrete mix with the influence of super plasticizer of (1.5%) ratio by weight of cement. The results had shown that the concrete compressive strength had increased with using (30%) of slag and (1%) of steel fibers of the CNC machine by- product, with (1.5%) of the super plasticizer, compared with the reference mixes. The results had shown also, that the concrete containing super plasticizer with slag (20%) and (1.0%) of the steel fibers had shown better flexural strength compared with the reference mixes at ages (7, 28 days). The results had also shown increasing in the transverse loading test of the pre cast concrete flags, especially when using slag of (30%) and steel fibers of (1%) and super plasticizer, compared with the reference mixes at ages (7, 28 days). The results had shown clear reduction of the absorption at slag ratio (30%) and (1.0%) of steel fibers with the super plasticizer, compared with the reference mixes at age (28 days).

Study on Bl-Level Drainage Problem by Analytical Methods

Nazar A. Sahib; Dakashina Moorthy

Volume 1, Issue 1 , January 1983, , Page 8-23

https://doi.org/10.30684/etj.1983.1.1

Abstract

The bi-level drainage problem is studied in this paper. The problem is represented by a linearized theoretical model and the same is solved by an analytical procedure making use of ... Read More ...

Generalization of Coefficient Method for Routing a Flood Through a Reservoir

G. Al-Mashidani

Volume 1, Issue 1 , January 1983, , Page 24-28

https://doi.org/10.30684/etj.1983.1.2

Abstract

The coefficient method has been generalized by assuming a nonlinear relationship between storage and outflow. An empirical procedure for the solution of general equation has been developed. ... Read More ...

Stress Distribution in a Wedge Indenter

M. I. Ghobrial

Volume 1, Issue 1 , January 1983, , Page 29-48

https://doi.org/10.30684/etj.1983.1.3

Abstract

Plasticity analysis for orthogonal wedge indentation of plastic rigid material suggests that the faces of the wedge will be subjected to uniformly distributed pressure and tangential ... Read More ...

Design and Analysis of Stormwa Ter Retention Ponds Based on Water Quality Objectives

D. W. Lafleur; E. A. McBean; S. A. Al-Nassri

Volume 1, Issue 1 , January 1983, , Page 49-61

https://doi.org/10.30684/etj.1983.1.4

Abstract

The change from rural to urban landaus has an effect on the volume, rate and quality of storm water runoff. The pollutants originating from a wide variety of processes such as soil ... Read More ...

On the Rigid Body Modes of Vibration Timoshenko Beamresting on an Elastic Foundation

Baha A.H. Abbas

Volume 1, Issue 1 , January 1983, , Page 62-71

https://doi.org/10.30684/etj.1983.1.5

Abstract

An Analytical method is Presented for the determination of the Frequencies of the Rigid body modes of Vibration Timoshenko Beamresting on an Elastic Foundation. The Results obtained ... Read More ...

A Comparison of the Use of Woolen, Semi-worsted and Worsted Spun Yarns from Awasi, Blackface, Hammadani and Crossbred Wool in Tufted Carpets.

Nasser Al- Rubaiey; J. I. Iredal

Volume 1, Issue 1 , January 1983, , Page 72-81

https://doi.org/10.30684/etj.1983.1.6

Abstract

The object of this paper is concerned with:a. The Evaluation of the Suitability of Awasi and Hammadani wool in tufted carpets after subjectively examining various wools widely ... Read More ...

Determination of Multiplication Factor M for Optimum Behaviour of Avalanche

Tariq Albaldawi; R. Alabedra; G. Lecoy

Volume 1, Issue 1 , January 1983, , Page 83-96

https://doi.org/10.30684/etj.1983.1.7

Abstract

The purpose of this paper is the determination of multiplication factor M for optimum behaviour of avalanche photodetectors. We compare two types of avalanche photodetectors: a silicon ... Read More ...

Mathematical Analysis of the Performance of Cylindrical – parabolic solar Concentrator

R. A. Al-Ashoor

Volume 1, Issue 1 , January 1983, , Page 97-112

https://doi.org/10.30684/etj.1983.1.8

Abstract

The paper gives theoretical analysis of the performance of cylinderical parabolic solar concentrator. Particular attention is given to the application of this type concentrator in the ... Read More ...

Computer Techniques in the Capacity Design of Pipe Networks

Sabah Al - Nassiri; Adel Alwan

Volume 01, Issue 2 , May 1977, , Page 5-22

https://doi.org/10.30684/etj.1977.2.1

Abstract

This article summarizes a new method for the capacity design of pipe networks using digital computers. The method is based on successive iteration technique. The input data and output ... Read More ...

Effect of Exhaust System on Diesel Engine Performance

M . E . Elsarha; A . I. Abdlfattah; A . I . Elsharkawy

Volume 01, Issue 2 , May 1977, , Page 23-33

https://doi.org/10.30684/etj.1977.2.2

Abstract

The function of the exhaust silencers is to reduce the noise level to an acceptable value to avoid the risk of ear damage when exposed to such noises for long periods. The drawback ... Read More ...

Investigation of the Traveling Wave Effects in Analysis of Synchronous Machine Transient Behavior

M. Serry taha

Volume 01, Issue 2 , May 1977, , Page 34-54

https://doi.org/10.30684/etj.1977.2.3

Abstract

This is one of a series of papers interested mainly in the overall transient behaviour of integrated power systems. With a target of introducing the whole system in a synchronous machine-wise ... Read More ...

Investigation of the Traveling Wave Effects in Analysis of Synchronous Machine Transient Behavior -2 The Synchronous Machine Performance

M . Serry Taha

Volume 01, Issue 2 , May 1977, , Page 55-76

https://doi.org/10.30684/etj.1977.2.4

Abstract

This is the second of a series of papers interested mainly in the overall transient behavic integrated power system constituting a synchronous machine connected to a large network a ... Read More ...

Main Subjects = Engineering

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