Al-Bahir Journal for Engineering and Pure Sciences

The moon is one of the closest celestial bodies to the earth and to understand its movement accurately we need to solve the equation of the movement of the three objects system (Earth - Moon
- Sun) Celestial mechanics program was used to obtain the orbital and orientation elements of the
moon for the year 2015 and the next hundred years, this program depends on numerical integrations
in solving Equation of motion of the three objects1 After mapping the results using the Matlab2010
program, it was observed that the change in the orbital elements was most likely periodically1 Also,
the orientation characteristics and the Euler angles of the moon were studied1 In addition, the physical and optical liberation was calculated for the next hundred years

Chemical spray pyrolysis was used to deposit Fe2O3 thin films on preheated
glass substrates at (200)0C. The films were annealed at (300), (400)
and (500)0C at ambient atmosphere. X ray diffraction (XRD) technique was
utilized to study the effect of annealing on the structure of Fe2O3 thin films.
XRD technique was utilized to study the effect of annealing temperature
on structural properties of Fe2O3 thin films. It was found that the as deposit
thin film has amorphous structure but it became polycrystalline structure by
annealing at (300) 0C with dominant orientation along [104] direction. with
dominant orientation along [104] direction. Crystallinity of Fe2O3 thin films
was improved with increasing annealing temperature (Ta). Crystallite size
increased with heat treatment from (23.3) to (29.3) nm for as deposit and
annealed sample at (500) 0C respectively. Other structural parameters like
micro strain (η), dislocation density and number of crystallites per unit area
were calculated and correlated with the variation of Ta. UV-Visible spectrophotometer
was used to study the annealing effects on optical properties
of Fe2O3 thin films. With increasing of Ta; optical energy gap (Eg) values
increased from (2.105) to (2.159) eV due to decreasing of localized states
inside the band gap from (0.396) to (0.162) eV

Double quantum dot solar cell system was modeled and studied by coupling
the minority carrier-continuity equation with the density matrix theory.
This makes it possible to take into account the contribution from ground
state in quantum dot (QD) in addition to wetting layer (WL) and barrier. The
contribution of different rates and the quantum efficiency are examined. It
is shown that the highest rate was that from barrier-to-WL in the conduction
band, thus, to get high QE one needs that this rate was high

In this study, the characteristics of compressive resistance of ordinary and produced Iraqi cement
were studied in Umm Qasr laboratories1 The study was conducted using cubic cement forms1 All the
samples prepared for this purpose contain a fixed mixing ratio (1/3) (1 cement / 3 sand) (50) mm per
rib and also \"using cubic concrete forms and the length of the rib (150) mm and the rate of mixing
(1 cement and 1.5 sand and 3 gravel), The study was carried out by adding the polypropylene fibers
obtained from the waste collected from the electrical and electronic packaging belts1 The additive
was used in the form of fibers of length 15 cm and thickness (0.1,0.2,0.3,0.4,0.5 cm) in the mortar
paste starting from the model base and placed The measurements were based on the method of
treatment (dry, wet, water) as well as the number of polypropylene fibers added and five ratios and
different thickness of these fibers. Also, Compression resistance of concrete with the same type
of the waste. The best results were obtained when adding one fiber and a length of (15) cm and a
thickness of (014) cm in the case of dry treatment and at the age of seven days1

Many algorithms of classification implemented to the issue of text categorization.
A large portion of the work implemented in the English text. On the other
hand, very few researchers implemented in the Arabic text. The nature of Arabic
text is very different than English text, and the preprocessing of the Arabic
text is extremely difficult and more challenging. In this paper, Maximum Weight
(MW) algorithm applied after preprocessing on the Arabic dataset that consists of
(16757) text files used for the first time. The results showed that MW is applicable
to Arabic text, it reached about (0.83) on average. 10-fold cross-validation used to
the reliability of the result

Samples are prepared from mixture of manufacture foam material
polyvinyl alcohol with ethylene glycol (PVA-EG) and additive of crushed and
sieved pomegranate peel (PP). Crushed pomegranate peel (PP) and the mixture are
diagnosed by Fourier transforms infrared (FTIR) spectrophotometer. The electrical
insulation parameters are measured. The dielectric parameters such as dielectric
constant (ɛ′), dielectric loss factor (ɛ′′), free space capacitance (Co), conductance
(Gs), dependent conductivity (σac), and independent conductivity (σdc) have
been investigation. There is a significant decrease in dielectric loss factor ε′′ to
2.39 as the grain sizes of crushed and sieved (PP) increased to (600) μm sample
(4), and various recent investigations of functionalization of PP fillers to improve
compatibility with polymers. The electrical conductivities of composites are found
to increase at sample (2) and (3) PP grain size (212) μm and (300) μm and decrease
at sample (4

Background: Coronary heart disease is a narrowing of coronary arteries due to accumulation of
fatty materials (plaque) build-up on its walls. This disease will decrease the oxygen-rich blood supply.
Coronary heart disease patients will suffer from pain and discomfort known as angina. Increasing
evidence regarding the potential association between periodontal diseases and cardiovascular diseases
has been identified in recent years. The available evidence underlines the importance of detecting
DNA of periodontal pathogens on atheromatous plaques as the first step in demonstrating the causal
relationship between these two conditions

The aim of This study was planned to estimate the conditions surround the
prevalence of diabetes mellitus in children and adolescents, less than18 years of
age throughout the period of (October 2012 - May 2013) in the Nasiriya city.
Materials and methods: (100) children and adolescents, the ages range between
(1-18) years, male and female previously diagnosed for at least (3) months with
Type 1 diabetes (DM-1), according to age, gender, area, onset of disease, crises
number, genetic risk factors, family economical level, clinical features, blood
parameters were included in the study.
The results: In the present study, diabetes mellitus affects(34%) at age of 1 day
to 1 year, and(44%_ of the patients at the age of (1-5) years and(69%) of family’s
patients have a mild economical level, and the majority of samples that didn’t
found crisis(53%). Showed the majority of the samples non genetic related risk
factors(68%).

A dominating set is a bi-dominating set in a graph, if every vertex in this set,
dominates exactly two vertices that, do not belong to the dominating set. In this
work, five new definitions of domination have been presented, which they are
a modified versions of bi-domination: “independent bi-domination; total bidomination,
connected bi-domination, restrained domination, and complementary
tree bi-domination”. Upper and lower bounds are determined for the size of graphs
having these parameters

In this work finite element ANSYS program is used to analyze the impact
stresses of (9) mm bullet impact on hybrid composite plate using explicit dynamic
and autodyne code. The material used in this work is unidirectional carbon fibers
and plain weave E-Glass with epoxy as matrix. The experimental work includes
manufacturing composite plates made from Carbon/E-Glass/Epoxy with different
thicknesses subjecting these plates to impact by 9mm bullets at speed of (37) m/s
from (5) m distance. The numerical results were proved by comparing the bullets
residual velocity, the ballistic limit, and the energy absorption with the results from
the experiment work. The results show that the shear and strain are maximum in
the front layers while the tensile stress is maximum at the rear layers. The hybrid
plates have good ballistic limit, and using E-Glass fibers with carbon fibers reduce
the cost and improving the energy absorption and the impact resistance

It is arbitrary that, Fredholm Integral Equations have got many variable
applications in different scientific domains. So, such brand of equation has attracted
many scientists’ and researchers’ attention in mathematics science.
Then, in this research, the researcher will produce new authentic method to
solve the second kind inhomogeneous Fredholm Integral Equation whose name
is Adomian Decomposition Method. The procedural steps of this method will be
produced and explained with its original as well as its modified modes in terms of
solution process through multiple kinds of examples