University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
3
2009
02
01
Design and Evaluation of a CAD/CAM System for Progressive Dies
88
100
EN
Tahseen
Fadhel.
Abbas
tfalani@ymail.com
Jamal
Hassain.
Mohammed
50128@uotechnology.edu.iq
Firas
Sadi
Abd-Alqader
10.30684/etj.27.3.16
The objective aim of this paper is to generate design and manufacturing data of the<br />main components of progressive dies depending on a 2D drawing ( low level entities) of<br />the desired part , then the drawing data manipulated and improved to create 2 ½ D<br />design drawing of the designed progressive die in step by step manner as follows:<br />· Geometrical checking of 2D part drawing elements.<br />· Pressure calculation.<br />· Part layout design.<br />· Design of punches, punches holder, pilot, die, and stripper.<br />· Construct a standard database.<br />· CNC program generation for machining of the designed progressive die parts.<br />The output data of each stage of the proposed system have been used as an input date<br />for the next stage in semi automated manner using Visual Basic Language for<br />Applications [VBA].The system have been implemented for design several progressive<br />dies of different parts to illustrate the system flexibility, then the design results have been<br />implemented for manufacturing one of these dies CNC wire cut machine.
https://etj.uotechnology.edu.iq/article_29178.html
https://etj.uotechnology.edu.iq/article_29178_564c46d9366b1b2a499fbf4804c968e2.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
3
2009
02
01
Using Diode Laser for Determination of Hemoglobin and GOT in Blood
101
110
EN
Abd-Alrahman
Rasheed.
Mohammed Murad
10.30684/etj.27.3.17
In this work , Semiconductor Laser Diode (SLD) emitting at 532nm wavelength and<br />1 mW power was used to detect and analyze the Hemoglobin and GOT in Blood instead<br />of Spectrophotometer.
https://etj.uotechnology.edu.iq/article_29179.html
https://etj.uotechnology.edu.iq/article_29179_e95f6d12c898f39193a1b56a0b8799d2.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
3
2009
02
01
The Effect of Thermal Behavior on Piston Design for Internal Combustion Engines
111
125
EN
Ahmed
Abdulrahman.
Al-Beiruti
Basem
Mohammed.
Fadhel
Afaq
Jassim.
Mahmood
10.30684/etj.27.3.18
This paper deals with a theoretical and analytical study of three real pistons of<br />internal combustion engines (work with gasoline). These pistons are different from each<br />other in shape, speed ,and power. Three dimension (3D) models for the real pistons were<br />build using Ansys software. The boundary conditions were set in order to carry out the<br />thermal analysis<br />The thermal analysis covered also cases of different changes in the shape of each<br />piston in order to carry out comparisons with the real shapes of the pistons.<br />The analysis offers to the designer the ability to understand the behavior of thermal<br />stresses, their locations and the way they spread in order to reach to the optimum design.
https://etj.uotechnology.edu.iq/article_29180.html
https://etj.uotechnology.edu.iq/article_29180_fa203fa7fa5eb5ba36004df7f9edcec3.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
3
2009
02
01
Improvement of solar cell efficiency by using Two mirrors V-trough concentrator
126
130
EN
Ali
Hadi.
Al-hamadani.
10.30684/etj.27.3.19
V-trough concentrator with four mirrors has been designed and constructed. Its<br />effects on the silicon solar cell performance were studied with and with out cooling<br />system. It was shown that the cell efficiency was increased from 11.94 % to 15.46 %<br />with out cooling and from 13.3 % to 16.4 % with cooling system. The effect of a<br />combination between Fresnel lens and V-trough concentrator was studied also. The solar<br />cell efficiency was improved to 24 % with out cooling and the best efficiency<br />improvement was 26.6% with cooling system.
solar cell,Efficiency,concentrator
https://etj.uotechnology.edu.iq/article_29181.html
https://etj.uotechnology.edu.iq/article_29181_e95cd645bca6988f0495d4c131f71b8e.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
3
2009
02
01
modification
131
143
EN
Ali
Rasool.
Mahdi
0000-0002-0162-4064
ali.j.mahdi@uokerbala.edu.iq
10.30684/etj.27.3.20
Modification of Dead space method by find a new values of dead space factor, is<br />called geometrical quenching, depending on a largest dimension of Benson's flames. An<br />experimental procedure are cried of Premixed Methan, Butan, and Propan have cared the<br />with air mixture at 25Co , 75Co , 100Co , and 125Co of unburned gases temperatures<br />condition have been detected practically for wide range of equivalence ratio by using<br />schlieren's photography method for tube burner.<br />The effect temperature and equivalence ratio on new factor are studies. Vertical<br />dead space has been detected, and effect of this dimension has been study. The burning<br />velocity recalculation by new technique and compares with calculation by CCM, and<br />find the percentage error is less than 10%.
https://etj.uotechnology.edu.iq/article_29184.html
https://etj.uotechnology.edu.iq/article_29184_78d03b9921879d4649a987cf11005efb.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
3
2009
02
01
Palmprint Characterization Using Multi-wavelet Transform for Human Identification
405
417
EN
Hana
M. Salman
10.30684/etj.27.3.1
The human hand presents the source for a numerous of physiological biometric<br />features, from these are palmprint, hand geometry, finger geometry and the vein pattern on<br />the dorsum of the hand, are mostly used in many fields for different applications. Lines and<br />points are extracted from palms for individual identification in original image or frequency<br />space. In this paper, a preprocessing to extract the central part from the input palmprint<br />image, next a 2-D multi-wavelet transform is used to convert the palmprint image into 16<br />sub-bands, and the texture feature vectors, energy and entropy for each of the 16 sub-bands<br />is computed and normalized with min-max method for individual identification. The<br />correlation distance is used as a similarity measure. The experimental results point up the<br />effectiveness of a method in either using low resolution or noisy images
human,Biometrics,Palmprint,multi,Wavelet,Texture Feature,correlation
https://etj.uotechnology.edu.iq/article_29157.html
https://etj.uotechnology.edu.iq/article_29157_1f896283239bd7e600c91f22a8048686.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
3
2009
02
01
The Effect Of Blending Of Linear Low –Density Polyethylene On Mechanical Properties Of High Density – Polyethylene
418
424
EN
Najat
J.Saleh
Nabeela
A. Mohammed
10.30684/etj.27.3.2
High – density polyethylene is an important commercial polymer and it is widely<br />used for different engineering applications. In the present work, polymer blends were<br />fabricated by mixing two types of polyethylene, high – density polyethylene was mixed<br />with different weight percent of linear – low – density polyethylene using two – roll<br />mill, the mixing machine was operated at a temperature of 135oC.<br />A series of standard tests (destructive), tensile, impact, hardness, and compression<br />were carried out on the prepared samples it was found that the addition of linear – low –<br />density polyethylene to the high – density polyethylene leads to decrease in the modulus<br />of elasticity, tensile strength, tensile strength at break and increase in the % elongation at<br />break.<br />For the impact test it was found that the addition of linear – low – density<br />polyethylene caused an increase in the impact strength of the material, the polymer blend<br />with 45 % wt of linear – low – density polyethylene gave the highest value of impact<br />strength.<br />On the other hand the hardness test was carried out and it was found that the addition<br />of linear – low – density polyethylene leads to decrease the hardness of the polymer<br />blends. Therefore, the neat high – density polyethylene gave the highest hardness value.
HDPE
https://etj.uotechnology.edu.iq/article_29160.html
https://etj.uotechnology.edu.iq/article_29160_f9fe4cd4101604dd545b0be7b5593630.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
3
2009
02
01
Predicting Mechanical Properties of High Performance Concrete by Using Non-destructive Tests
425
444
EN
Shakir
A. Al-Mishhadani
Waleed
A. Al-Qaisi
Sura
F. Al-Khafaji
10.30684/etj.27.3.3
In this study, high performance concrete mixes were produced by using high<br />range water reducing agent and also by using 10% silica fume or 10% high<br />reactivity metakaolin as a partial replacement by weight of cement. Three cement<br />contents (350, 450, and 550) kg/m3 were used through this study. A total of 330<br />(100 mm) cubes, 132 (100×200 mm) cylinders, 132 (100×100×400 mm) prisms,<br />and 66 (150×300 mm) cylinders were casted and cured to the required age of test .<br />All specimens were cured in tap water except 165 cubes, which were submerged in<br />Cl ˉ + SO4ˉ ˉ solution at concentration identical to those present in severe<br />aggressive environment to study the effect of this solution on the compressive<br />strength of high performance concrete mixes. Compressive strength, splitting<br />tensile strength, modulus of rupture, static modulus, rebound number, ultrasonic<br />pulse velocity, dynamic modulus, initial surface absorption, density ,and total<br />absorption tests were investigated for all mixes at 7, 28, 90, and 120 days age.<br />Results of the destructive tests (compressive tensile strength, strength, splitting<br />modulus of rupture, and static modulus) and non–destructive tests (hammer,<br />ultrasonic pulse velocity, and dynamic modulus) are statistically analyzed by using<br />SPSS Ver.15 software to study the possibility of predicting the mechanical<br />properties of high performance concrete by using non–destructive tests. Simple and<br />multiple linear regression analysis of the obtained results leads to the proposed<br />statistical models for evaluating the compressive strength, splitting tensile<br />strength, modulus of rupture, and static modulus by using one or two or three of<br />the above mentioned non–destructive tests. Analysis of variance (ANOVA)<br />and t–test was also used to investigate the adequacy of the statistical models.
high performance concrete,Mechanical properties,non,destructive Tests,Superplasticizer,Silica fume,High Reactivity Metakaolin
https://etj.uotechnology.edu.iq/article_29161.html
https://etj.uotechnology.edu.iq/article_29161_9213b4c2bde4ebc475880aa0f9015b71.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
3
2009
02
01
Evaluation of Bearing Capacity from Field and Laboratory Tests
445
453
EN
Azad
Abbas Ahmad
Qasim
Abdulkarem JassimAl-Obaidi
Ali
Abdulkadhim Jasim Al-Shamcy
10.30684/etj.27.3.4
In this work, the comparison between the values of bearing capacity of soil<br />determined by two different methods, the first method is field plate load test and the<br />second method is several laboratory tests. The study find out that the allowable bearing<br />capacity estimated from the first method widely near from its value computed by second<br />method. Also this study confirm the probability of using Plate load test for estimating<br />soil bearing capacity for small jobs and shallow layer depth to avoid using<br />comprehensive soil investigation and economizing both cost and time. Empirical<br />relation ship for bearing capacity estimation achieved from the results of the two<br />methods by using stiff brown silty clay soil at Erbil governorate - north of Iraq.
bearing capacity,Plate load test,Modulus of subgrade reaction,Unconfined Compression Test,soil settlement
https://etj.uotechnology.edu.iq/article_29162.html
https://etj.uotechnology.edu.iq/article_29162_6b95124d7b4862d51fb19da5cf94adaf.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
3
2009
02
01
The Effects of Bearing Dimensions and Adjustable Mechanism Position for Six Pads Bearing under Dynamic Load
454
467
EN
Muhannad
Zedan Khalifa
10.30684/etj.27.3.5
The hydrodynamic bearing consists of six pads these pads have the ability to tilt<br />about the clamping edge. Reynolds equation (2D) for dynamically loaded was used to find<br />the generated pressure value throughout the mobility method and the finite difference<br />method. The effects of many parameters of bearing were studied in this paper such as length<br />to diameter ratios, power loss, oil flow rate, Sommerfeld number, load number, friction<br />coefficient and by using the “Ansys program” for stress and strain analysis over the pad<br />surface (white metal), to select the best position location for adjustable pads mechanism<br />from leading edge angle to trailing edge angle of pad central angle (PCA=55°) by taking<br />nine different positions. The best angle for the adjusting member was found about (41.25o)<br />after leading angle of the pad, the adjusting member in the maximum pressure region gave<br />minimum radial displacement (elastic deformation) values.
non,circular bearings,adjustable mechanism,Hydrodynamic bearing parameters
https://etj.uotechnology.edu.iq/article_29163.html
https://etj.uotechnology.edu.iq/article_29163_a693560aa2b81f7b0d25d2385c7391d6.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
3
2009
02
01
Petroleum Single Cell Protein Production
468
480
EN
Ahmed
H. Abduljabbar
Shahrazad
R. Raouf
Jasim
Alhelu
10.30684/etj.27.3.6
This study focuses on producing single cell protein from petroleum fraction (ethanol, kerosene,<br />gas oil) by growing two types of microorganisms (Candida sp. and Bacillus subtilis) on these<br />materials as energy and carbon source , These two types of microorganisms are isolated from<br />contaminated soils cv with petroleum derivatives brought from AL-Dorah and Beji refineries , fuel<br />stations ,and garages . At the first stage the microorganisms are cultivated on different media (blood<br />and nutrient agar ) and on mineral salt medium (MSM) to identify on genus of each type . After this<br />, the microorganisms are grown on different concentrations of ethanol , kerosene , gas oil (0.5, 1.0,<br />2.0, 3.0, 4.0 ( v/v)% ) at 7.4 pH and 32°C temperature . In the second stage the microorganisms are<br />growing in still liquid culture at the same conditions . In this stage the yield percent, number of cell<br />per milliliter , and biomass weight are calculated for either type of microorganisms. Composite<br />rotatable Box –Wilson experimental design is adopted to design the experimental work .<br />Statistically , the response functions (i.e. yield percent of ethanol , kerosene , gas oil ) are related to<br />the most effective variables on single cell protein (SCP) production . The temperature is fixed at<br />32°C at this stage also, because the range of temperature growth of these microorganisms is narrow<br />(30 to 34°C) , where there is no significant effect at this range of temperature. Concentration and<br />pH are ranged between 0.5to 4.0% and 7.0to9.0 respectively . Optimum conditions are determined<br />and found equal to 7.36 for pH and 1.31% for concentration for ethanol , 7.42 and 4.0% for<br />kerosene, and 7.51 and 4.0% for gas oil .The percentage of crude protein was evaluated according<br />to Kjedhal method . The maximum protein content was 61.25% which was closed to the results<br />obtained by previous studies. The bioassay was carried out using chicken embryos , where chicken<br />eggs were used for this purpose. The result of bioassay was 83.5% of successful eggs , which is<br />acceptable with the percent given by Kohen Lee.The last stage is designing a batch bioreactor and<br />calculating all process parameters depending on the results of experimental work in pervious stages<br />, In general , the characteristics of (SCP) production using two types of microorganisms are agreed<br />well with general characterization of (SCP) production that accommodates the general concepts of<br />(SCP) production .
SCP Production,Single Cell Protein
https://etj.uotechnology.edu.iq/article_29164.html
https://etj.uotechnology.edu.iq/article_29164_228bd01778fc53be292731abe08fff67.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
3
2009
02
01
Hydrodynamics Of Two Phase Flow For Coalescing And Non Coalescing Systems
481
495
EN
Hiba
M. Abdullah
Thamer
J. Mohammed
Mohammed
F. Abid
10.30684/etj.27.3.7
This experimental study is aimed at investigating the effect of superficial gas<br />velocity, liquid phase properties and gas distribution on gas holdup, bubble<br />characteristics and drag coefficient in two-phase bubble column. Various liquids<br />covering a sufficiently broad range of viscosity and surface tension values were<br />employed, while the gas phase was atmospheric air. Aqueous glycerine solutions were<br />used to simulate the behavior of coalescing viscous liquids whereas aqueous alcohol<br />solutions were used to simulate the behavior of non-coalescing organic liquids. The<br />experimental results obtained with two different types of gas distributor in the<br />coalescence solutions and in non coalescence solutions were compared with data on<br />standard air–water system. A computerized conductivity probe system and high speed<br />digital camera were used for the systematic measurements of bubble size, velocity and<br />gas hold-up. Correlations based on dimensionless groups were proposed for the<br />prediction of gas holdup and drag coefficient in the homogeneous flow regime.
Hydrodynamics,Two,Phase Flow,Drag Coefficient,Coalescing System,Non Coalescing System
https://etj.uotechnology.edu.iq/article_29165.html
https://etj.uotechnology.edu.iq/article_29165_80351d6170d0445b4b0b3d30864d0565.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
3
2009
02
01
Spectral Analysis of Some Selected Hydrochemical Parameter Of Diyala River
496
512
EN
Aqeel
S. Al-Adili
Qusay
A. Al-Suhail
10.30684/etj.27.3.8
Some selected hydrochemical parameters of Diyala river including electrical<br />conductivity (EC), 1<br />3<br />2 1<br />4<br />Ca+2 ,Mg+2 ,SO- ,Cl - ,HCO- , total soluble solids (T.S.S.),<br />discharge (Q) and total hardness(TH) were analyzed for their periodicities using monthly<br />measurements for the period 1993-1997, to quantify and qualify surface water and<br />investigate the periodicity behavior of these parameters. Results showed significant<br />autocorrelation for all the studied series and therefore they were subjected to the Spectral<br />(Fourier) analysis to investigate the main periodicities that contribute to the total<br />variance of the observed data. Most of the selected parameters have strong (less<br />frequent) semi-annual and biannual cycle, as well as seasonal cycle for, Cl, Mg, Ca, SO4,<br />HCO3 ,TSS , and EC. These results reveal the variation of the factors affecting the river<br />water quality including hydrological and meteorological conditions as well as the impact<br />of human activities through the river catchments river.
Periodicities,Spectral,Harmonic analysis,autocorrelation
https://etj.uotechnology.edu.iq/article_29170.html
https://etj.uotechnology.edu.iq/article_29170_eab081f0d1c41e9066a8ce8e6da947d4.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
3
2009
02
01
Properties of High Performance Lightweight Concrete Sandwich Panels Using Local Additives
513
533
EN
Husain
M.Husain
Zain
A. Raouf
Wasan
I. Khalil
10.30684/etj.27.3.9
The main aim of this investigation is to produce high performance lightweight concrete<br />sandwich panels consisting of two layers of mortar having different mesh reinforcement<br />and feeded polystyrene concrete core in between. Locally pozzolanic material (ultra –<br />fine feldspar) is used to produce the high performance mortar as partial replacement of<br />cement. The effect of various factors such as core thickness, volume fraction and type of<br />reinforcement (polyimide grids, polypropylene meshes and chicken wire meshes) has<br />been investigated. The work covers the physical properties of the mortar and polystyrene<br />concrete core. Also the structural properties and behaviour of eight series of 1000mm<br />length and 200mm width concrete sandwich panels with two reinforced mortar faces of<br />20 mm in thickness and core of 30 and 50mm in thickness from polystyrene concrete<br />were investigated by nondestructive and destructive methods.<br />The nondestructive tests included the density and dynamic modulus for mortar and<br />polystyrene concrete. Also the density and dynamic properties of the concrete sandwich<br />panels as a whole (dynamic modulus of elasticity, Poisson’s ratio and stiffness constant)<br />were determined by ultrasonic pulse velocity. Flexural properties such as, first crack and<br />ultimate loads, moment capacity, modulus of rupture, resilience, ductility and toughness<br />of the concrete sandwich panels were investigated from the destructive tests .<br />The results show that the ultimate moment increases as the core thickness and the<br />volume fraction of different types of reinforcement increase and the modulus of rupture<br />increases as volume fraction of reinforcement increase. Also it was shown that concrete<br />sandwich panels with high toughness and ductility can be obtained by using polyimide<br />grids or polypropylene meshes to reinforce the compression and tension faces of the<br />panels.
https://etj.uotechnology.edu.iq/article_29171.html
https://etj.uotechnology.edu.iq/article_29171_54648e4b635a257f133dcbb406b5d802.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
3
2009
02
01
Vibration Analysis of Sudden Enlargement Pipe Conveying Fluid with Presence of Heat Flux
534
558
EN
Mauwafak
A.Tawfik
Zena
K.Kadhim
Ruaa
Y. Hammoudi
10.30684/etj.27.3.10
The vibrated pipe conveying fluid with sudden enlargement and exposed to heat flux is<br /> studying in this paper. The governing equations of motion for this system are derived by using<br /> beam theory. The effect of external force that applied at the mid length (at the enlargement) of<br /> the pipe is studied. The transfer matrix method is a technique that used in this study. From<br /> this technique it can be compute the natural frequencies, mode shapes, deflection, slope,<br /> bending moment, shear force, velocity, and pressure for different cases of pipe conveying<br /> fluid (with and without heat flux), also the effect of forced vibration on these parameter are<br /> presented. Different types of supports are used to show the effect of changing the support's<br /> type on the behavior of this system at different fluid velocities and heat flux. Also the effect<br /> of change the values of fluid velocities and heat flux on the Coriolis and compressive force<br /> are studied. The results of this study are compared with the results that found from ANSYS<br /> program, also another comparison is made with the last investigation. Those comparisons<br /> show good agreement.
Sudden Enlargement Pipe,Vibration in Pipe,Pipe Conveying Fluid with Heat Flux
https://etj.uotechnology.edu.iq/article_29172.html
https://etj.uotechnology.edu.iq/article_29172_d783f3630ebe697c6c0785225069a24f.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
3
2009
02
01
Harmonics Distribution in Electrical Power System Containing Static Var Compensator
559
572
EN
Mohammed
K. Edan
10.30684/etj.27.3.11
This research presents a harmonic analysis of the power system with static VAR<br />compensator. The model is formed by parallel combination of Thyristor Control<br />Reactor (TCR) with a bank of capacitor .This model based on use of harmonic<br />switching functions and this harmonic model is completely general and can be<br />interpreted as a harmonic admittance equivalent. It is suitable for direct<br />incorporation into the harmonic domain frame of reference where it combines<br />easily with frequency dependent admittances of the transmission network, and<br />with other linearised component. This approach leads to efficient iterative solution<br />of power networks containing TCR. The general operating condition corresponds<br />to a case, when the switching instant of thyristor valve are function of network<br />nodal voltage conditions, this applies to both thyristor turn-on and turn-off<br />instants. In such situation the voltage zero crossing points calculated with good<br />accuracy at each iterative step, are used to update the TCR switching function.<br />Newton-Raphson technique is used to determine the zero-crossing points.
harmonics,Static var compensator,Harmonic analysis
https://etj.uotechnology.edu.iq/article_29173.html
https://etj.uotechnology.edu.iq/article_29173_50951f62be41ade6e76d94faa123a1be.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
3
2009
02
01
Designing of Computer Aided Visual System for Workstations Layout Planning Based on Efficiency Criteria
573
583
EN
Zainab
A.Ibrahim
10.30684/etj.27.3.12
Layout planning in industrial plants means planning the location of all machines,<br />utilities, workers, workstations, and department...Etc.five basic types of layout, fixed-position,<br />cellar, process, product &hybrid. This research study Product layout problem through study<br />problem of arranging number of machines, workers, workstations on a production line in way<br />achieves uniform materials flow, this problem is known as single row facility layout, this<br />problem is very difficult to be solved in fact. The aim of the research is to designs and builds<br />computer aided visual planning system to study product layout problem, helps the management<br />in layout planning process and in decision making about the workstations arrangement based on<br />efficiency criteria. The suggested planning system was built by Auto lisp language and display<br />the system outputs on computer screen in two ways visual diagram (workstation timeworkstation<br />number), calculated outputs (actual cycle time, workstations number, efficiency<br />actual daily production rate) .the suggested system was applied on lawn mower production line<br />gets from reference to show the sequence of system working, inputs & visual outputs, so the<br />system will study all possible workstations layout. Current workstations arrangement consists of<br />series four workstations& line Efficiency=81.82%, the efficiency can improve &increases to<br />90% by re-arranges the workstations& distributes the total work in five serial workstations.
Layout planning,product layout,Production line,Single line,Efficiency
https://etj.uotechnology.edu.iq/article_29174.html
https://etj.uotechnology.edu.iq/article_29174_5b452f1b60f92c9fc8ea75d198021f69.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
3
2009
02
01
Analysis of Linearity Response and Spectral Responsivity in CdS Photoconductive Detector
584
591
EN
Selma
M. H. Al- Jawad
Ali
M. Mousa
10.30684/etj.27.3.13
Thin films of cadmium sulfide have been deposited by chemical bath deposition.<br />The effect of temperature and time deposition on spectral responsivity for CdS<br />photoconductive investigation. The effect of temperature bath and time deposition<br />where study. Linearity response of photoconductive detector were carry on analyzing<br />the light current with incident power curves. The results show that high spectral non<br />saturated responsivity was achieved, further the detector were manufacture with low<br />cost.
CdS thin films,photoconductive detector,CBD
https://etj.uotechnology.edu.iq/article_29175.html
https://etj.uotechnology.edu.iq/article_29175_9f0ca593d28da114b40330c3743048ac.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
3
2009
02
01
Simuation Study of the Factors Effect on the Directional Controllability of Vehicles
592
599
EN
Ahmed
N. Al-khazraji
10.30684/etj.27.3.14
This paper present the result of the work carried out the mathematical model of two<br />degree of freedom movement study the influence of cornering stiffness of tires, the<br />distance from the position of the center of gravity to front and rear axel and mass of<br />vehicles.<br />Theoretical calculations have been carried out the vehicle have known mass and the<br />position of the center of gravity.<br />Results show that for the state which is the front tires are bias ply tires and the rear tires<br />are radial ply tires is the best because the state gives under steer behavior. Also the state<br />will be the center of gravity nearest from the front axel gives the same behavior and also<br />owing to the existence of center of gravity being nearest to the front axle.
mechanical engineering,model analysis,simulation,controllability,vehicles
https://etj.uotechnology.edu.iq/article_29176.html
https://etj.uotechnology.edu.iq/article_29176_fac38d8399aca9d25471c91236619e0e.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
3
2009
02
01
Simulation and Application to Measure Comparable Performance of Push,Pull and Hybrid Manufacturing Systems
600
623
EN
Hussein
S. Ketan
Nahidh
Jaffar K
10.30684/etj.27.3.15
In this paper we are going to integrate the most popular production systems nowadays<br />that is; push ,pull production system, ,then we compare the performance of the integrated<br />production model or the hybrid outcome system to push and pull, by introduce a technique that<br />optimizes production control of single product flow shop under the three production control<br />through using the production control framework. Evaluating a production control policy usually<br />requires simulation modelling due to the complex interaction that occur,a point was considered by<br />simulation package exploit. Then we demonstrate how this template can be used in conjuction<br />with this existing simulation software to find an optimal production control policy. Our decision<br />variables are location of the push-pull interface. An experemental research prototype of such<br />push, pull and hybrid control system has been constructed to emulate a motor production at real<br />world plant in which unit process and operational decisions are integrated. The simulation<br />software implemented to support the manufacturing system planning and its operational<br />control.the system configuration, modelling feature and its verification modelling, feature and its<br />verification through an application of the practical manufacturing line will be described.
push,pull,Hybrid Systems,kanban,discrete event simulation
https://etj.uotechnology.edu.iq/article_29177.html
https://etj.uotechnology.edu.iq/article_29177_6bced65dbd0d4a0c8b0a6a713735b719.pdf