ORIGINAL_ARTICLE
Processing of Butter From Anhydrous Milk Fat and Reconstituted Dried Skim Milk
Butter was produced from a mixture of anhydrous milk fat and reconstituted dried skim milk in a ratio of 1:3 and different percentages (0-5%) added to starter mixture. Electrical butter churner was used for butter production. Composition, physicochemical, microbiological, and the effect of cold storage at 8ْ C of the resultant butter were studied. The composition of the resultant butter was similar to natural butter and it was awarded a total score of 92.5 for the organoleptic properties (taste, flavor, shape, body(texture), color) as compared to 97.0 for the natural butter. The pH of butter was reduced from 6.5 to 4.5 with increasing the added starter from 0 to 5%. Peroxide values of freshly prepared butter were 0.15-0.30 and increased up to 0.25-0.45 after 4 weeks of cold storage. The total bacterial counts, coliform counts, yeast and mold counts were within thelimits of the standards.
https://etj.uotechnology.edu.iq/article_33937_45cd0672e52406fa9bbc9955442eac74.pdf
2010-07-01
723
731
10.30684/etj.28.14.17
ORIGINAL_ARTICLE
The Effect of Carbon Particles on Styropore Solvent by Benzene
In this research is improvement of physical and mechanical properties bysolvent the styropore with labaritory benzene (C6H6) and then mixing withdifferent weighted ratio of carbon particles ( 2.5 , 7.5 , 15 , 30 and 60 )% at size less from 63ìm were added to dissolved styropore to proper samples were applied to many tests of dielectric constant, hardness, thermal conductivity.
https://etj.uotechnology.edu.iq/article_33938_90620df052aa322544a06e9575c25a05.pdf
2010-07-01
732
742
10.30684/etj.28.14.18
ORIGINAL_ARTICLE
Establishing Total Quality Management Application System For School Building Projects in Iraq
ISO 9001 certificate becomes an important issue in the resent time specially for global objectives companies that have an extended activities over different countries. ISO certificate considered as passing permit which over come all barriers and introduce a company, establishment, or organization to customers certifying its products and management compatibility to the certificate requirements. Locally the certificate becomes an important effort toward applying the mentionedspecification due to different reasons. The first reason is organizationally to create an environment conditions to achieve quality in their products and operations, the second reason is to raise morale and to inforce confidence in their sel’fs, and their organization in a level that is not less than the level of other internationalorganizations. Other reason in contracted one whether internally and specially externally which require the optioning of ISO certificate.School building directorate considered one of the governmental importantdirectorates. Its importance is due to its function of providing scientific services to the society. Therefore the construction of school buildings will be constructed according to the highest quality standards and specifications. Achieving the required standard is the responsibility of the designer and the constructor which means in general is the responsibility school building directorates.This research reveals that there is no total quality management system that is applied by for school buildings in Iraq even when some total quality items were appeared that are applied in this research and this is due to the efficiency of some administrations and its obedience to the existing law. The research recommended full items application of the proposed total quality management system. Program is prepared to simulate the application of total quality management system having different approaches and benefit can be obtained by a adopting theapplication of the program by contracting companies, and school buildingdirectorates.
https://etj.uotechnology.edu.iq/article_33939_43a5abcb83d40b61e6ec977924c6a8a5.pdf
2010-07-01
743
760
10.30684/etj.28.14.19
ORIGINAL_ARTICLE
Tensile Strength of Lime Stabilized Gypseous Soil
This work aims to study the properties of tensile strength of lime stabilized gypseous soil considering to the following variables: curing conditions which include the temperature and duration of curing and initial water content. In addition, the effect of wetting anddrying cycles on the tensile strength was carried out. The soil was stabilized with a (3%) lime as a results of the unconfined compressive strength. The results indicated a significant improvement of the tensile strengths, and increases with the curing temperature andduration. When the curing duration extended to (180) days at (49, 60C0), a reduction in the tensile strength occurred as compared with the samples cured for (90) days. The effect of drying and wetting cycles on the tensile strength for the lime treated soil were investigated. The treated samples were subjected to (15) cycles of drying and wetting, the results showed a reduction in the tensile strength varied between (2-64 %).
https://etj.uotechnology.edu.iq/article_33940_381bdc32ffce753d00e71aa48e0f7c4b.pdf
2010-07-01
761
772
10.30684/etj.28.14.20
ORIGINAL_ARTICLE
Effect of Alumina-Doping on Structural and Optical Properties of Zno Thin Films by Pulsed Laser Deposition
Alumina-doped Zinc Oxide (AZO) thin films on quarts glass substrateshave been deposited by pulsed laser deposition technique using a pulsed Nd-YAG laser with the wavelength of (ë= 532 nm) and duration (7ns).The structural and optical properties of these films were characterized as a function of Al2O3 content (0-5w.t%)in the target at substrate temperatures (400°C) and energy fluence (0.4 J/cm2). The X-ray diffraction patterns of the films showed that the undoped and Al2O3 -doped ZnO films exhibit wurtzite crystal structure and high crystalline quality. The optical properties were characterized bytransmittance, absorption spectroscopy measurements. For all films the average transmission in the wavelength range (330-900) nm was over 90% and the absorption edge shifted toward a shorter wavelength as Al2O3 concentration increased. The optical energy gap of Al2O3 doped ZnO thin films, measured from transmittance spectra could be controlled between (3.32eV and 3.59eV) by adjusting alumina concentration. AFM results show that the samples with increasing concentration of Al2O3, the surface roughness increases
https://etj.uotechnology.edu.iq/article_33277_846e11972bb904a6ed029f32647dd8bb.pdf
2010-07-01
4677
4686
10.30684/etj.28.14.1
Ali
A. Yousif
1
AUTHOR
Nadir
F. Habubi
2
AUTHOR
Adawiya
J.Haidar
3
AUTHOR
ORIGINAL_ARTICLE
Convergence of The Discrete Classical Optimal Control Problem To The Continuous Classical Optimal Control Problem Including A Nonlinear Hyperbolic P.D. Equation
Our focus in this paper is to study the behaviour in the limit of the discrete classical optimal control problem including partial differential equations of nonlinear hyperbolic type. We study that the discrete state and its discrete derivative are stable in Hilbert spaces 1 H0(W) and L2(W) respectively. The discrete state equations containing discrete controls converge to the continuous state equations. The convergent of a subsequence of the sequence of discrete classical optimal for the discrete optimal control problem, to a continuous classical optimal control for the continuous optimal control problem is proved. Finally the necessary conditions for optimality of the discrete classical optimal control problem converge to the necessary conditions for optimality of the continuous optimal control problem, so as the minimum principle in blockwise form for optimality.
https://etj.uotechnology.edu.iq/article_33285_671d5e0cfc82fa0d0c0e44d24def19c0.pdf
2010-07-01
4687
4702
10.30684/etj.28.14.2
Optimal control
Nonlinear Systems
State Constrains
Classical Controls
Converges
stability
Jamil
A. Ali Al-Hawasy
1
AUTHOR
ORIGINAL_ARTICLE
Nonlinear Analysis of Thermoviscoelasticity of Laminated Composites
The nonlinear thermoviscoelastic behavior of composite thin plates isinvestigated. An experimental program covers an achievement of creep tests under different temperatures, dimensions of specimens and distribution loads to describe the equation of creep compliance. The stress relaxation is also determined from the experimental creep compliance. A new equation of creep compliance function D(ts, ,T) and relaxation modulus E(t,e,T) were predicted from the experimental results to describe the nonlinear thermoviscoelastic behavior of composite thin plates. A good agreement has been observed between the proposed models of nonlinear behavior at different temperatures and experimental results and between both theoretical and FEM results.It was found that thus the deflection is increasing at the beginning and the rate of increase is nearly constant and increase with increasing temperature from 30 Co to 60 Co with approximate rate (34.6%) for simply support plate at distributed load (q=1.934E-3 N/mm2), relative dimensions (a/b)=1.0 and time=15 min.The results indicate that the shear stress increases with rate (50.7%), so that strain in y-axis increases with rate (19%) as a result of increase the temperature from (30 Co to 60 Co).
https://etj.uotechnology.edu.iq/article_33293_ab7216f8e636fa84ad9b40686f4b7bb0.pdf
2010-07-01
4703
4721
10.30684/etj.28.14.3
Thermoviscoelastic
Stress Relaxation
Relaxation Modulus
Creep Compliance
Muhsin
J.Jweeg
1
AUTHOR
Adnan
M. Al-Sultany
2
AUTHOR
Raed
Naeem Hwyyin
3
AUTHOR
ORIGINAL_ARTICLE
Approximated Solution of Higher–Order Linear Fredholm Integro–Differential Equations by Computing of Singular Value Decomposition (SVD)
Our main concern here is to give an approximate scheme to solve a linearFredholm integro–differential equations of higher–order (LFIDE) using expansion method with the expansion functions as basis functions associated with weighted residual technique ( collocation method ). Computing of singular value decomposition (SVD) has been used to treat these equations approximately. For this method a program is written in matlab (ver.6.5), examples are solved, results are tabulated and comparison is made between the exact and the approximate solution depending on least squares error method.
https://etj.uotechnology.edu.iq/article_33296_86724dd72c9e7cd94ab4ba736646b8e3.pdf
2010-07-01
4722
4729
10.30684/etj.28.14.4
linear Fredholm integro
expansion method
and singular value decomposition
Amaal
A. Mohammed
1
AUTHOR
Sudad
K. Ibraheem
2
AUTHOR
ORIGINAL_ARTICLE
Design and Implementation of Adaptive Modulation Modem Based on Software Defined Radio(SDR) for WiMAX System
This paper presents design and implementation of adaptivemodulation modem for WiMAX system. (BPSK, QPSK, 8QAM, 16QAM,32QAM and 64QAM) are used in this work. Software Defined Radio(SDR)is used for implementing this modem. This work examines the benefits ofusing adaptive modulation in terms of probability of bit error and spectralefficiency. It specifically examines the performance enhancement madepossible by using linear prediction along with channel estimation inconjunction with adaptive modulation. Simulation results proved that theadaptive system performance with estimator and predictor is better thanother modulation alone. The simulation results for adaptive modulation incompared to each modulation technique alone show that for BER=10-3 with(fd=50Hz -200Hz)system the improvement occurs by decreasing S/N by 2-3dB. As for BER=10-4 with same Doppler frequency, the systemimprovement takes place by decreasing S/N by 1.3dB- 4dB. RecardingBER=10-5 with same Doppler frequency, the improvement is by decreasingS/N by 1.5dB-5 dB. Simulation results also show the flexibility of theadaptive system to operate with different level of modulation based onswitching of S/N. Matlab7.8(R2009a) used for simulation of adaptivemodulation system with AWGN and fading channel.
https://etj.uotechnology.edu.iq/article_33297_ed9f098d66eca18048a3e5a26bc411d8.pdf
2010-07-01
4730
4749
10.30684/etj.28.14.5
SDR
Adaptive Modulation
Linear prediction
Estimation of SNR
Fading
H.
T. Ziboon
1
AUTHOR
Zeinah
Tariq Naif
2
AUTHOR
ORIGINAL_ARTICLE
Evaluation of Transverse Construction Joints of Reinforced Concrete Beams
Construction joints are stopping places in the process of placing concrete, and they are required because in many structures it is impractical to place concrete in one continuous operation. The amount of concrete that can be placed at one time is governed by batching and mixing capacity and by the strength of the formwork. A good construction joint should provide adequate flexural and shear continuity through the interface. In this study, available experimental tests were analyzed by using a nonlinear three-dimensional finite element ANSYS computer program (v. 9). In addition an interface model was proposed for the transverse construction joints.Six beams with different transverse construction joints at mid-span as well as to one reference beam without joint are analyzed. The reliability of the model is demonstrated by comparison with the experiment and alternative numerical analysis which shows 5-7% difference.
https://etj.uotechnology.edu.iq/article_33416_ed1eb71721178c66478ff761598afd56.pdf
2010-07-01
4750
4773
10.30684/etj.28.14.6
construction joints
ANSYS
Finite element method
Reinforced Concrete Beams
Qais
Abdul-Majeed
1
AUTHOR
ORIGINAL_ARTICLE
Performance Characteristic of Distributed Erbium Doped Fiber Amplifier(D-EDFA)
D-EDFA have their signal gain distributed over long fiber lengths. This paper deals with gain and noise figure characteristics at 150dB/km Rayleigh constant of a forward, and bidirectional pumped distributed EDFAs, operating in 1550 nm as a function of fiber length, Erbium ion density, injected pump power and signal input power. These studies are done by using optiystem 6.0 software simulation (opticalamplifier and communication system design software) at bit rate of 2.5 Gbps
https://etj.uotechnology.edu.iq/article_33449_3ed8a6979b0ef701bcc65b69a92022b8.pdf
2010-07-01
4774
4788
10.30684/etj.28.14.7
distributed erbium doped fiber amplifier
EDFA
Gain
noise figure
Sharif
M. Rashid
1
AUTHOR
Banaz
Omer Rasheed
2
AUTHOR
ORIGINAL_ARTICLE
Developing Multistage Heuristic Algorithm To Minimize Idle Time And Makespan In Job Shop Scheduling
The behavior and performance of job shops have been the focus andattention in both operations research and operations management literature. Job shop scheduling has received this large amount of attention, because it has the potential to dramatically decrease costs and increase throughput, thereby, profits. Moreover, the increasing of product customization creates more job shop environment in manufacturing world. No doubt, a wide variety of approaches tothe modeling and solution of job shop scheduling problems have been reported in the literature. But, the research in this area is continuous. In this paper, Multistage Heuristic Algorithm based on priority dispatching rules is developed. This algorithm has been implemented to solve three cases. Schedules generated havebeen compared with those obtained by means of the basic algorithm. As a result, Multistage Heuristic Algorithm shows the ability of minimizing: machines idle time, total time of machines and makespan.
https://etj.uotechnology.edu.iq/article_33453_3a0b6c0109f5c55877c3e0a433def892.pdf
2010-07-01
4789
4805
10.30684/etj.28.14.8
Multistage Heuristic Algorithm
Job shop scheduling
Priority dispatching rules
Make span
Machines idle time
Mahmoud
Abbas Mahmoud
1
AUTHOR
ORIGINAL_ARTICLE
Two Layer Optimum Design of Low Dispersion Optical Fiber (1500-1600 nm) Using Evolutionary Synthesis.
Amathematical procedure for optimization depends on the evolutionaryalgorithm has been proposed to estimate the optimum design of single mode optical fiber upon finding the core and cladding material and core radius. The results of the optimum design achieved minimum total dispersion and minimum dispersion slope. The operating wavelengths are chosen in the range (1500-1600) nm. The optimization using evolutionary algorithm can explore all the possible solutions and then choosing the best solution that has maximum merit function
https://etj.uotechnology.edu.iq/article_33509_5a589486e56c6a18ac5d6a2ade4b1c29.pdf
2010-07-01
4806
4815
10.30684/etj.28.14.9
Optical Fiber
Low Dispersion Optical Fiber
Alaa
Hussain
1
AUTHOR
Ali
H. Al-Hamdani
2
AUTHOR
Muhammed
A. Hussain
3
AUTHOR
ORIGINAL_ARTICLE
Power Series Method For Solving Nonlinear Volterra Integro-Differential Equations of The Second Kind
In this work, we present the power series method for solving special typesof the first order nonlinear Volterra integro-differential equations of the second kind. To show the efficiency of this method, we solve some numerical examples
https://etj.uotechnology.edu.iq/article_33511_02ed7246f78960a1fe30b8417ff751f2.pdf
2010-07-01
4816
4824
10.30684/etj.28.14.10
integro
Differential
power series
Hanan
Mahmood Hasson
1
AUTHOR
ORIGINAL_ARTICLE
The Study of Immunological And Cytogenetic Effects of Polyvinyl Alcohol
This study has been designed to investigate the toxicity effects ofpolyvinyl alcohol at different concentrations on peripheral blood lymphocytes by measuring each of blastogenic index, mitotic index and chromosomal aberration in addition to the polymorph nuclear leukocytes activity through determine both of the phagocytosis percent and phagocytosis index .The results show that PVA have no toxic effects at the concentrations 0.1,1,10,100,250 ƒÊg/ml because the cytogenetic parameters undergo not significantly raised (at P < 0.05) andphagocytosis percent and phagocytosis index have been increased significantly (at P . 0.05). The immune response has been found to be significantly too (P . 0.05) in the presence of PVA with Candida albicans antigen as adjuvant via increasing the foot pad swelling in the immunized mice with 50 ƒÊg/ml of C.albicans antigen.
https://etj.uotechnology.edu.iq/article_33567_49f06ca36cd9448ebd6c2eee39cdc194.pdf
2010-07-01
4825
4832
10.30684/etj.28.14.11
Polyvinyl alcohol
genotoxicity
phagocytoses
Falak
O. Abas
1
AUTHOR
Azhar
M. Halim
2
AUTHOR
ORIGINAL_ARTICLE
The Dependence of Organic Bulk Heterojunction Solar Cells Efficiency on The Charge Carrier Mobility
The power conversion efficiency of organic solar cells based on donoracceptor blends is governed by two competing processes, extraction and recombination of charge carriers. Both processes are strongly dependent on the charge carrier mobility. Using microscopic effective medium simulation, we demonstrate that the best device efficiencies are achieved in the mobility range . For lower mobilities lead to losses by bimolecular recombination and higher mobilities lead to a reduction of the open circuit voltage, and consequently a drop in efficiency
https://etj.uotechnology.edu.iq/article_33568_12589ae618831f1f1ed319533c46dde8.pdf
2010-07-01
4833
4842
10.30684/etj.28.14.12
Organic solar cells
BHJ solar cells
Efficiency of organic solar cells
Wisam
A. Latif
1
AUTHOR
Dayah
N. Raouf
2
AUTHOR
ORIGINAL_ARTICLE
The Design of a Tuned Mass Damper as a Vibration Absorber
The protection of civil structures, including their material contents andhuman occupants, is without doubt a world-wide priority of most serious currentresearch. Such protection may range from reliable operation and comfort, on onehand, to serviceability on the other. Examples of such structures which leap toone’s mind include buildings, towers, and bridges. In like manner, events whichcause the need for such protective measures are environmental like earthquakesand winds, or moving loads like cars and pedestrians in the case of bridges. Theearthquake hazard is translated in severe vibrations for the structural systems. Inorder to handle this world wide problem auxiliary damping devices is added toabsorb those vibrations. One of the early used damping devices is the Tuned MassDamper (TMD) which is a passive system in that it absorbs the structural responsewithout adding an external control signal. In this work a case study of three storiesbuilding model excited by a simulated earthquake hazard is investigated versus theresponse of the same building supplied by a TMD.
https://etj.uotechnology.edu.iq/article_33569_1712709ae62970445077ccaf27211726.pdf
2010-07-01
4843
4852
10.30684/etj.28.14.13
Structural systems
Passive Dampers
TMD
Earthquake hazard
Taghreed
M. Mohammad Ridha
1
AUTHOR
ORIGINAL_ARTICLE
Factors Affecting Compatibility between (S.B.R) Polymer Repair Materials and Concrete Substrate
In this study, the compatibility of polymer modified repair mortar andsubstrate concrete was investigated in three stages. First stage includes studying the individual properties of polymer and conventional repair materials, and also two types of concrete, such as compressive strength, split tensile strength, and flexural strength using standard ASTM test procedure. Second stage includes evaluating the bond strength of composite cylinder for different combinations of repair materialsand substrate concrete. Third stage includes investigating the compatibility using a composite beam of repair material and substrate concrete under third point loading. The experimental results show that the compressive strength, split tensile strength and flexural strength is not a crucial factors for the success of concrete repair system. While bond strength tests are provide strong indication about thecompatibility. The bond strength of S.B.R polymer material produced by Al- Khaleej Company was not strong enough to be recommended to use for concrete repairing systems.
https://etj.uotechnology.edu.iq/article_33570_c687c640aea696be102d4ce982080ded.pdf
2010-07-01
4853
4865
10.30684/etj.28.14.14
bond test
compatibility
Concrete repair materials
polymer
Haider
A. Abdul-Hameed
1
AUTHOR
Aseel
S. Mansi
2
AUTHOR
Maan
S. Hassan
3
AUTHOR
ORIGINAL_ARTICLE
Generalized Spline Approximation Method for Solving Ordinary and Partial Differential Equations
The main theme of this paper is to approximate the solution of ordinarydifferential equations by using basis of generalized spline functions then using tensor product analysis to generalize the approximation for solving partial differential equations, (PDE's).
https://etj.uotechnology.edu.iq/article_33572_1d5f6dee3df9e1bb0e775b8104e08650.pdf
2010-07-01
4866
4873
10.30684/etj.28.14.15
Generalized splines
tensor product
ordinary and partial differential equations
Nabaa
N. Hasan
1
AUTHOR
Suha
N. Al-Rawi
2
AUTHOR
Fadhel
S.Fadhel
3
AUTHOR
ORIGINAL_ARTICLE
Dynamic Failure Mode And Impact Energy Absorption of Filament-Wound Square Cross-Section Composite Tubes
In the present work simulation of impact response using LS-DYNA explicitfinite element code is described to investigate the crash behavior and energy absorption characteristics of square glass fiber reinforced plastic tubes, subjected to impact load. Filament-wound tubes with two layers [+45º, -45º] were fabricated and tested. The experimental crushing characteristics data are compared with the obtained numerical results, showing good agreement. The effect of geometrical parameters, winding angle and the failure mode on the energy absorption characteristics are also investigated.
https://etj.uotechnology.edu.iq/article_33575_9d14805a8afc316223a7f3907e1ce54e.pdf
2010-07-01
4874
4889
10.30684/etj.28.14.16
Filament
wound tube
energy absorption
DYNA
impact
Winding angle
Mohammad
Abdul Hassan Whaib
1
AUTHOR
Hussain
J. Al-Alkawi
2
AUTHOR