ISSN: 1999-8716

Volume 6, Issue 1

Volume 6, Issue 1, Winter 2013, Page 1-120


STUDYING THE EFFECT OF ND-GLASS LASER ON THE DIELECTRICALLY PROPERTIES OF CERAMIC MATERIALS

Nadia Mohammed Jassim

DIYALA JOURNAL OF ENGINEERING SCIENCES, Volume 6, Issue 1, Pages 1-11

ABSTRACT:- ( Nd – Glass laser. Ceramic, dielectrically constant) The aim of the present
research is to study the effect of Nd-glass laser to the dielectrically properties of the ceramic
body and compare the results with and without the effect of laser. The experimental method
includes two part: part one includes the calculation of the dielectrically constant of the
ceramic body that’s formed from three materials(kaolin Dukala,Quartz, potassium fildspar )
with thickness 3-3.5mm by using LCR meter, type Agilenty 4294Aparcil Imperlence. So we
calculation the value of the dielectrically constant from the value of the produced amplitude
from the changeable frequency. Part two from the research includes the effect of Nd-glass
laser radiation with different energies E= 600, 700, 800Mj, to the ceramic sample and
calculation the dielectrically constant too, and then compare this value for the ceramic
samples with and without the effect of laser radiation.

KINETIC OF ATROPINE PERTRACTION FROM THE SEEDS OF DATURA METEL LINN PLANT USING LIQUIDLIQUID MEMBRANE TECHNIQUE

Ameel M. Rahman; Khalid W. Hameed; Mohanned H. Salman; Maha H. Al-Hassani

DIYALA JOURNAL OF ENGINEERING SCIENCES, Volume 6, Issue 1, Pages 1-16

ABSTRACT:- The kinetic of atropine pertraction from seeds of Datura Metel Linn plant
was studied. Diisopropyl ether, n-hexane and n-heptane were used as membranes for atropine
recovery. The effect of speed of agitation and time in the range of 200-300 rpm and 0-3.5h,
respectively were studied using the proposed membranes. The pertraction experiments were
carried outs in a batch laboratory unit. The liquid-liquid pertraction was found to be very
suitable for atropine recovery from its liquid extracts of Datura Metel seeds. A high purity
(94-96%) can be obtained in the receiver phase. The pertraction process was found to be very
selective for atropine recovery with diisopropyl ether membrane. As the speed of agitation
increases the efficiency of pertraction increases within the studied range.

EFFECT OF ADDING THE WASTE PRODUCTEDALUMINUM FACTORIES ON THE THERMAL CONDUCTIVITY FACTOR OF THE CONCRETE

Mohammed K. Albayti; Ali H. Hammeed; Assal T. Hussein

DIYALA JOURNAL OF ENGINEERING SCIENCES, Volume 6, Issue 1, Pages 12-23

ABSTRACT:- This research was studying the effect of added aluminum fiber from the
waste product of aluminum factories on the properties of concrete mixes. The study involved
a reference concrete mix (M0) without admixture of aluminum and compare with three mixes
(M3,M5,and M10) ,with three percent (3%,5%, and10%) from weight of cement, Specifically
The thermal conductivity factor (k) was calculated depending on the equation of ACI code
(122-R-2002) for mix concrete. The laboratory testes (slump flow, density, compressive
strength) were doing for the cubes samples with dimension (150*150*150) to concrete
mixes(M0,M3,M5),and M10) in age (7,14,and 28)day. The affect thermal conductivity factor
of concrete was depended on the effect of workability, density and compressive strength with
age sample. The results were getting from the testing found the density ,thermal conductivity
factor and compressive strength decreasing with adding the admixture of aluminum (7%-
20%),(17%-45%) and (30%-54%) respectively, because of the reaction between the
aluminum fiber with compound of cement cause the babble gas (Cellular concrete ) due to
reduction in the density and compressive strength .

COMPARISON OF DIFFERENT UNCONVENTIONAL THERMAL ENERGIES FOR STEEL CUTTING PROCESS

Jasim Hassan Rasheed

DIYALA JOURNAL OF ENGINEERING SCIENCES, Volume 6, Issue 1, Pages 17-26

ABSTRACT:- different unconventional heat sources for material processing were
discussed . The heat sources such as plasma arc, electron beam and Co2 laser were employed
previously by other researchers, while " Co2laser– gas mixture" system was studied during
the present research .
Comparison between the results of present work with the others mentioned above was
made . The parameter which was adopted for comparison is the "energy consumed per unit
length" for particular thickness .The parameter is based on the equation which was suggested
by the author of this research .
Linear relationship between energy per unit length with thickness forCo2 laser alone
and "Co2laser – gasmixture " was found, while for other heat sources it was found out of the
proportionality. This comparison showed the superiority of the "Co2laser –gas mixture"
system over the other heat sources during cutting mild steel.

STUDY EFFECT OF ALTERNATIVE MOVEMENT ON RATE OF DRY AND WET WEAR AND ON THE MICROSTRUCTURE OF STRUCTURAL STEEL TYPE (A36ASTM)

Mohammed Abdulateef Ahmed Al-Khazraji

DIYALA JOURNAL OF ENGINEERING SCIENCES, Volume 6, Issue 1, Pages 24-36

ABSTRACT:- This research aimed to study the deference between the dry and wet
wear was applied on structural steel A 36 ASTM, in the beginning the samples were prepared
by cutting, grinding and polishing then these samples were applied in the wear set under two
part, one under dry wear and second under wet wear (in corrosive media in this case sea
water), weight loss was measured to know the deference between two cases. The
experimental work tests were done using special device which was locally designed and
manufactured .The results showed the wet wear experience loss in weight more than the dry
wear because of the stress corrosion.

INVESTIGATION OF PHASE NOISE ON THE PERFORMANCE OF LMS-RLS ADAPTIVE EQUALIZER

Radhi Shabib Kaned

DIYALA JOURNAL OF ENGINEERING SCIENCES, Volume 6, Issue 1, Pages 27-35

ABSTRACT:- This paper investigates the effect of phase noise on equalization of
communication channels using least mean square (LMS) and recursive least square (RLS)
adaptive algorithms. The aim of the investigation is to mitigate inter-symbol interference
(ISI) caused by the channel and to impose the bit error rate (BER) in the received signals.
The equalizerusestwobasicadaptivealgorithms: LMS algorithmand RLS algorithm.
Without LMS-RLS equalizer,theBER ismorethan when the system modelincludesLMS-RLS
equalizer as indicated in table (1) and table (2). Equalizer algorithm is analyzed using
MATLAB v.9 Communication Block Set.

THE EFFECT OF STEEL PLATE ON THE DEFLECTION OF SELF COMPACTED REINFORCED CONCRETE BEAM WITH AND WITHOUT OPENING

Ali Sabah AL-Amili

DIYALA JOURNAL OF ENGINEERING SCIENCES, Volume 6, Issue 1, Pages 36-49

ABSTRACT:- In this work aims at studying the influence of steel plate on the deflection
of self- compacted reinforced concrete beams was investigated experimentally in this study to
know the flexural behavior of these beams. Eight simply supported reinforced concrete beam
were tested under the action of two point loads .The deflections of the beams with and without
plate are measured. The steel plates of thickness (3 mm) with dimensions ( 170 × 350 mm)
were used. These plates were sticked on the concrete beams using epoxy. The steel plate
inside the beam was sticked with and without epoxy (epoxy type EP), while the beams were
taken with and without opening (10 mm diameter). The results show that the plate increased
the capacity of the beam by increased the value of failure load. Hence, the beam with internal
plate with epoxy increased the failure load by 34.2% than beam without plate , and 24.6%
than beam with internal plate without epoxy , and 19.7% than beam with external plate with
epoxy .

THE EFFECT OF NANO METAKAOLIN MATERIAL ON SOME PROPERTIES OF CONCRETE

Zeinab H.Naji; Amer M.Ibrahem; Shakir A. Al-Mishhadani

DIYALA JOURNAL OF ENGINEERING SCIENCES, Volume 6, Issue 1, Pages 50-61

ABSTRACT:- This investigation aimed to study the effect of nano metakaolin ( NMK ) on
some properties (compressive strength ,splitting tensile strength & water absorption ) of
concrete. The nano metakaolin (NMK) was prepared by thermal activation of kaolin clay for 2
hours at 750 Ċ. The cement used in this investigation consists of ordinary Portland cement
(OPC). The OPC was partially substituted by NMK of ( 3, 5 & 10%) by weight of cement.
The C45 concrete was prepared , using water/cement ratio ( W/c) of (0.53) .The Water
absorption was tested at 28 days while the tests (compressive strength ,splitting tensile
strength) were tested at ages of (7, 28, 60,& 90) days . The compressive strength and
splitting tensile strength of concrete with NMK were higher than that of reference concrete
with the same W/c ratio.The improvement in the compressive strength when using NMK was
(42.2, 55.8 , 63.1% ) at age 28 days for ( 3%, 5%, &10% ) replacement of NMK respectively
whereas the improvement in the splitting tensile strength was (0% , 36% & 46.8 %) at age of
28 days when using (3%, 5%, &10% ) NMK respectively. The improvement in the water
absorption was (16.6%, 21.79%, &25.6 ) when using (3, 5, &10% )NMK.

A NOVEL METHOD FOR TUNING PID CONTROLLER

Abidaoun H. shallal; Rawaa A. Karim; Osama Y. Al-Rawi

DIYALA JOURNAL OF ENGINEERING SCIENCES, Volume 6, Issue 1, Pages 62-74

ABSTRACT:- Proportional integral derivative (PID) control is the most commonly used
control algorithm in the industry today. PID controller popularity can be attributed to the
controller’s effectiveness in a wide range of operation conditions, its functional simplicity,
and the ease with which engineers can implement it using current computer technology .
In this paper,the Dc servomotor model is chosen according to his good electrical and
mechanical performances more than other Dc motor models , discuss the novel method for
tuning PID controller and comparison with Ziegler - Nichols method from through
parameters of transient response of any system which uses PID compensator .

FAST CONVOLUTION AND CORRELATION ALGORITHM FOR MULTIDIMENSIONAL SIGNALS

Emad Hmood Salman

DIYALA JOURNAL OF ENGINEERING SCIENCES, Volume 6, Issue 1, Pages 75-89

ABSTRACT:- The technical world is changing very rapidly. In recent three decades, the
power of personal computers has increased by a factor of nearly one-thousand. By all
accounts, it will increase by another factor of one-thousand in the next decade. This
tremendous power has changed the way science and engineering is done, and there is no
better example of this than digital signal processing (DSP).
This proposal is a fast algorithm to compute some important mathematical operations
in the DSP, which are the convolution and the correlation (both linear and circular). These
operations are entered in most application daily computers, cellular phones, aerospace,
medical devices, mechanical statuses, images processing, TV conferences, and other.
Therefore, that to get at time realization system (i.e. to reduce the delay of time in any
system).

NON-LINEAR ANALYSIS OF PLATED T-SUBJECTED TO NEGATIVE BENDING MOMENT

Ahmed Abdullah Mansor

DIYALA JOURNAL OF ENGINEERING SCIENCES, Volume 6, Issue 1, Pages 90-104

ABSTRUCT:- This paper present a numerical analysis using ANSYS finite element
program to simulate the reinforced concrete T- beams strengthened with external bonded
steel plates when subjected to negative bending. Eight beams with length 2.0m and simply
supported were modeled. Nonlinear materials behavior, as it relates to steel reinforcing bars
and plain concrete, and linear behavior for plate is simulated using appropriate constitutive
models. The results showed that the general behavior of the finite element models represented
by the load-deflection curves at midspanappear well agreement with the test data from the
previous researches. Also the crack patterns at the final loads from the finite models are
discussed . The finite element models represented by this search can be used to carry out
parametric study for the strengthening of plated T-beams.

SIMULATION OF BACK PRESSURE EFFECT ON BEHAVIOUR OF CONVERGENT DIVERGENT NOZZLE

Nazar Muneam Mahmood

DIYALA JOURNAL OF ENGINEERING SCIENCES, Volume 6, Issue 1, Pages 105-120

ABSTRACT:- In this research a simulation of steady flow of a gas through a convergent
divergent nozzle which has a varying cross sectional area will be considered. The nature of
the flow can be explained by considering how the flow and its characteristics in the nozzle
changes as nthe back pressure Pb is decreased.
The characteristics of gas flow i.e.(Mach number, static pressure, density, velocity
magnitude and static temperature) distributions for the convergent divergent nozzle are
implemented by using the ANSYS Fluent 12.1 software to solve the quasi-one dimensional
nozzle flow.
The reductions in the back pressure cannot affect conditions upstream of the throat. The
nozzle is, therefore, choked. The shock wave increases the pressure, density and temperature
and reduces the velocity and Mach number to a subsonic value, and as back pressure is
further reduced to a certain value, the extent of the supersonic flow region increases, the
shock wave moving further down the divergent portion of the nozzle towards the exit plane.