Dijlah Journal

Abstract:
In this applied theory study presents the results of theoretical investigation
of the normalized Birefringence produced in a single - mode optical fiber,
when this fiber produced under high accuracy manufacturing process to uses
it in long - haul communication field.
We suppose (by implying some experimental thesis) that the fiber core
contains a slight ellipticity lies between the range (es = (1-10.01) percent),
when the ellipticity comes from a manufacturing process imperfection.
We find the induced birefringence is small, then could not affect on the
state of the guided light, but it may causes a limited fluctuation in it in a long
fiber distanced.
In the other hand when we introduce a large ellipticity (eL = (15-91)
percent), intentionally to enhancing the internal geometrical Birefringence. We
find that the induced birefringence did not satisfied the minimum required
value to design polarization maintaining fibers, this mean that the geometric
contribution alone could not design such a fiber without introduce the other
kind called "stress birefringence".

At the present time, there are many data available and saved sets on the web,
medical data is one of them; because of its huge volume it is importance I’ll classify it
with effective techniques to use it more clearly with the best way. Data mining
techniques is one of the most popular and effective classification tools that is used , a
lot of these tools are available for free such as Weka, Rapid miner, Knime and Orange
which are easy to use.
In this research we choose Orange as data mining tool to classify two types of
selected medical data for testing (Breast cancer and heart-disease) depending on
previous medical tests by taking a set of information such as cholesterol, chest pain,
blood pressure, blood sugar, age and sex to find if the patient with or without disease
then find the best algorithm for classification using accurate measures as best
performance criteria by applying decision tree, Naïve Bayes and K-nearest neighbor
classification algorithms on the chosen data and comparing them.

In this paper, the aerodynamic force coefficients of the airfoil were evaluated numerically.
The airfoil is geometrically identical to the NACA 64A012 airfoil. The study was done on
this airfoil with and without suspended wing above the leading edge. It was found
numerically that both lift and drag coefficients increase by adding of suspended wing. The
pressure and velocity distribution was obtained in order to locate the separation point in
addition to the overall aerodynamic characteristics. The CFD code (FLUENT 6.2) packages
were utilized for simulating the flow around the airfoil. The control of the plane was done by
the end of the airfoil (flaps), if an early separation of the flow occurred, will be a loss of
control over the forces of lifting and braking of the aircraft, therefore a wing stabilizer added to
delay the separation point and improve the aerodynamic characteristics of the airfoil.
The results illustrate the benefits of adding suspended airfoil above the leading edge of the
airfoil, the separation was removed from the trailing edge at the same angle of attack in both
cases. The lift coefficient increased by about (32%) at the maximum angle of attack, while the drag
coefficient increased by about (20%) only

Abstract:
A hospital –based perspective study involving 30 cases of thalassemic
patients admitted and operated at Ibn-Albalady hospital in surgical unit since
April 2010 to September 2017. Splenomegaly was operated upon on selective
variables. The main variables assessed for splenectomy were blood transfusion
requirement, high and huge splenic size. The results show that a mark decrease
in frequency of blood transfusion and improve capacity of life. We recommended
that the splenectomy should not be with held if indicated. Longer follow up is
required for better evaluation of long term efficacy and late complication after
splenectomy

In this paper, a laboratory prototype was designed and built to test the forced
convection heat transfer from out surface of hollow cylinder with inner porosity
20% at different heat fluxes. The effect of regarding parameters such as Nusselt,
Rayleigh and Reynold numbers on heat transfer and the flow character are
observed. The experimental results shows that local Nusselt number of the
external cylinder decrease with the reduction of Rayleigh number by 46.7% at
maximum level and 21.7% at minimum level when Rayleigh number decrease
from 4 ∗ 107
to1 ∗ 107
. While it increase with Reynolds number by 21.8% at
maximum level and 40% at minimum when Reynolds number rise from 500 to
2200 (minimum to maximum). Out surface temperature of cylinder was reducing
if using porosity

Pervious concrete is considered one of the important elements in
establishing sustainable cities because it is characterized by its open voids
structure, which allows it to have specific applications such as residential
roads, pervious pavements, sidewalks, alleys, parking lots, patios, and so on.
It is of great benefit because it allows water to penetrate through it due to little
its cement content and the available voids, and thus it maintains this water
cycle and on the other hand it works as a water purifier from pollutants.
Although its resistance is relatively little compared to normal concrete, it has
some important characteristics that made it one of the most important types of
concrete used in paving paths and roads of little and medium traffic volume.
For these reasons, we focus on the various properties of previous concrete in
this article.

Reactive arthritis (ReA) is a kind of inflammatory that affects the joints which
develops as a result of several forms of genitourinary or gastrointestinal
infections, illustrating the typica interaction between the host and the
environment. Spondyloarthropathies are a kind of arthritis that affects the
spine (SpAs). A triad of symptoms involving the synovium, conjunctiva, and
urethra characterizes the normal sickness; nevertheless, the majority of
people doesn't have this ternary. ReA can be post venereal (Chlamydia
trachomatis [Ct]) or post dysentery ( Campylobacter, Yersinia, Shigella and
Salmonella) however various additional bacteria were linked to the disease.
For a variety of reasons, conducting epidemiologic and prospective research
on ReA has been problematic. Over-reliance on the typical trio of symptoms,
as well as the numerous words and eponyms used to define the ailment, has
confused the illness description and definition.