Kirkuk Journal of Science

This study is a prospective study we follow - up (284) patients with a symptomatic
unilateral , unilocular , ovarian cyst sized (3-8 ) cm in diameterc in non menopausal
women . The results were spoutaneous regression after observation of two menstrual
cycles , in (64.4) % of cases , with or ithout the use of oral contraceptives . The
percentage of regression varied in versely with the size of adnexal mass , the persisted
ones were (35.6) % they removed surgically and all were found benign in nature , the
surgery was Laprotomy in 67 % and Laproscopy in 33 % In conclusion there is no
harm in observation for a period of two menstrual cycles of a symptomatic unilocular
ovarian cyst with a nechoic pattern and no sign of malignancg in non – menopausal
women as there is (64.4) % spontaneous regression without the need of surgery.

In this study, a solar collector that uses porous media has been designed and
constructed as an absorbing and storing heat surface. The solar collector is inclined of
(

45
) with the horizon. Heat has been absorbed from the collector by forced convection
of air. A theoretical and experimental study was made for testing the performance of the
collector in continuous operating of an air blower( from
9
a.m to
4
p.m) The highest
instantaneous efficiency of the collector was about (
20%
), while the highest different
between air input temperature and air output temperature from solar collector was
about(C10).

The study area is an isolated ultramafic complex composite of harzburgite-dunitechromitite association in Qalander area, abut 10 km east of Mergesur, Erbil City,
northern Iraq. The chromite-bearing rocks are located within lower part of Walash
Volcanic Series of Paleocene-Eocene age. They form concordant, podiform bodies with
cataclastic and pull-apart texture that occur in two localities (A and B). Electron
microprobe and X-ray diffraction analysis indicate that the studied chromites are of
alpine-type, Cr-rich in location A and Al-rich in locality B. The disseminated chromites
in harzburgite have Cr# of 0.35-0.87 ; and 0.42-0.56 in localities A&B respectively and
Cr# rang between 0.38-0.48 in the dunite associates of localities B. The disseminated
chromites of both localities are richer in Fe and TiO2 than the associated massive
chromite. Olivine and pyroxene are primary inclusions in chromitite, while serpentine,
chlorite and calcite represent the secondary inclusions as alteration products of the
primary inclusions. The distinctive Cr# displayed by chromitite of two localities (A&B)
are attributed to harzburgite from two different tectonic setting. Chromitites, however
are formed by wall rock-melt interaction involving refractory harzburgite from different
tectonic environment leading to two chemically distinct Cr-rich chromite domains. High
Cr# of chromite of locality A, suggest supra-subduction zone environment, indicates
genetic linkage with some bonitite, or high-Mg arc tholeiities which are available in
supra-subduction zone; lower Cr# in location B suggest mid-oceanic ridge setting.

The research use discriminate analysis which considered one of the important
statistical methods in the classification of single variable or more for the populations
under study depending on specific variable taking in consideration some types of
advance discriminate functions in this field and apply them on two types of heart
diseases for the build of probability model to distinguish two differences between them
depending on signs, symptoms and some factors that may lead to cause the disease. This
type of analysis show that the logistic model is superior to other models in this research
regarding the ratio of wrong classification in comparison with the other models

One of the common techniques in analyzing multivariate data is analyzing of the
principal components. This transforms large number of related variables into lesser
number of no related components (PCA).
In case of existence of outliers, which can be detected in several ways, then the
dependence of variance and ordinary covariance matrices, also correlation matrix,
would lead to misleading results in analyzing the principal components.
The aim of this research is to introduce a new and fast algorithm in analyzing the
robust principal components; when data contain outliers, while conventional methods
fall in detecting outliers in data; then the results are misleading. The method is
implemented to show its real effectiveness on variables affecting the increase of
aluminum level in blood.

A new genus of larger foraminifera, Bicyclina (type: Cycledomia iranica) n. gen.,
from the Mishrif limestone ( Late Cenomanian )in Rifaiy area of southern Iraq is
described and figured .This new form belongs to the family Peneroplidae.The
difference with other genera showing comparable structures and the stratigraphic
position are described.

The occurrence of acid phosphatase activity amongst the leishmanias has been
investigated with the aim of determining whether the enzymes are adaptations for
survival and growth in insect or mammals. The results of the study suggest that there are
no marked differences between the acid phosphatase activity of L.major mid log and
stationary phase promastigotes. The activities of both, however, differed considerably
from those of L.tropica and L.donovani . In contrast to L.tropica and L.donovani, is
the apparent lack of surface acid phosphatase on L.major, and so it is suggested that the
surface enzyme is not essential for survival of all leishmanias in macrophage.

Each of cotton varieties Halab90, SP8886, Verkana2, Stonvill 474 and Nazley87
(as males) were crossed to three other varieties (as females), respectively: (Cocker310,
Deer22, Cocker5114), (Lachata, Dunn1047, Acala SJ2), (Halab33, Montana, Rekka5),
(IK347, IK259, Mersoomy1), (Mersoomy4, Deltapine50 and Delatapine5409) using
nested mating design. Parents and 15 hybrids among them were planted using
randomized complete block design with three replications to study heterosis, general
combining ability and estimate phenotypic variance components and some genetic
parameters for traits: ginning outturn, lint index, fineness, 50% & 2.5% span length,
fiber length uniformity, fiber strength and elongation. The results indicated than mean
square of genotypes highly significant for ginning outturn, lint index and elongation,
and mean square of males and female/male significant for the most traits. The varieties
Cocker310, Cocker5114, Acala SJ2 and Montana seemed to have significant desirable
general combining ability for larger number of traits. The cross (Halab90 x Cocker310)
gave significant hybrid vigor for larger number of traits. Additive genetic variance
values more than dominance one for: fiber fineness, 50% & 2.5% span length and
elongation, and the reverse for the remainder traits, and the average degree of
dominance exceeded one for all traits indicated the presence of over dominance except
50% 7 2.5% span length. The broad sense heritability low for fiber fineness and 2.5%
span length, high for ginning outturn, lint index and elongation, and moderate for other
traits, while narrow sense heritability low for ginning outturn, lint index and fineness,
and moderate for other traits. The expected genetic advance was shown low for all traits
(Ranged from 0.329% for lint index to 5.963% for fiber elongation).

The present work is an attempt to study the level of selenium in (63) samples of
human breast milk which were collected in Tikrit region. The concentrations ranged
(27.4 - 22.8 mg/L), while the concentration in (143) samples of commercially available
infant formula sold in Iraq the concentration was ranged (33.6-22.2 mg/L). From (124)
samples animal milk the concentration ranged (22.0- 12.0 mg/L). Selenium content of
the samples was determined by atomic absorption – hydride generation. The mean
concentration of selenium in the topsoil and subsoil was (0.17, 0.21 mg/kg) , which
determined by Graphite Flameless Atomic Absorption spectroscopy. Selenium is an
integral part of the enzyme glutathione peroxidase, a long with vitamin E –Se acts as a
part of anti-oxidant defense system of cell protecting lipids in cell membranes from the
destructive effects of H2O2 and super oxide generated by excess oxygen. in the same
mothers, was detected by HPLC, And the level of this vitamin was ranged between
(0.82-1.13 µg/dL).

This investigation involves development of a new kinetic
spectrophotometric and a reverse phase-high performance liquid
chromatography (RP-HPLC) methods for the determination of aspartame
AS in pharmaceutical preparations. Spectrophotometric method was based
on the oxidation of the drug AS with alkaline potassium permanganate. The
reaction is followed spectrometrically by measuring the rate change of the
absorbance of AS at 600nm. A fixed-time (at 48 min) method is adopted
for determining the drug concentration. A linear calibration graph was in
the range of 1-7μg.ml-1
, with a correlation coefficient of 0.9998, detection
limit of 0.101μg.ml-1
, molar absorption coefficient is 5.2×104
L/mol.cm,
Sandels sensitivity (S) 0.0056 μg/cm2
and relative standard deviation
RSD% of 1.40%. In HPLC method, the drug was analyzed using RP-HPLC
method with a Zorbax ODS-C18 (15cm×4.6mm i.d); analytical column
(5μm partical size) and Isocratic elution with a mobile phase containing
15% acetonitrile in 0.02M sodium acetate buffer (pH 5.4), at a flow rate of
1ml.min-1
, 20 μl sample loop, and the UV detector was set at λmax 220nm,
Calibration graph was in the range of 10-70 μg.ml-1 with a correlation
coefficient of 0.9991, detection limit of 1.09μg.ml-1
and a relative standard
deviation of 0.91%.The two methods were applied successfully to
determine the content of AS in pharmaceutical preparations with a recovery
of 98.8-99.3%.

This paper presents an approximate method to solve unconstrained optimal control
problem (OCP).This method is classified as a direct method in which an OCP is
converted into a mathematical programming problem.The proposed direct method is
employed by using the state parameterization technique with the aid of Laguerre
polynomials and Laguerre functions to approximate the system state variables. To
facilitate the computations within this method, new properties their proofs of Laguerre
polynomials and Laguerre functions are given with proof.Furthermore, we will derive
the condition under which the proposed method with Laguerre functions converges to
the solution of the OCP equation. We will also show that for N (the number of basis
functions) sufficiently large, the approximate states stabilize the system.The proposed
method has been applied on several numerical examples and we find that it gives better
or comparable results compared with some other methods.

In this paper we have investigate a new class of conjugate gradient algorithms for
unconstrained non- linear optimization which employ inexact line searches and
designed for general use. Some theoretical results are investigated which ensure the
local convergence of the new proposed algorithms and they compared numerically with
the standard HS-CG algorithm(Hestenes & Stiefel ,1952) using a number of test
functions for the dimensions between 2 to 400 with some promising numerical results .

In this paper the definition of centrally prime rings is introduced , our main purpose
is to classify those centrally prime rings which are commutative and so that several
conditions are given each of which makes a centrally prime ring commutative.

In this paper we introduce the linear operator of fractional integral equation of the
second kind (FIESK) in the framework of the Riemann-Liouville fractional calculus.
Some results concerning the existence and uniqueness have been also obtained.
Particular attention is devoted to the technique of Laplace transform for treating
FIESK. By applying this technique we shall derive the analytical solutions of the
most linear FIESK.Other main objective concern here is to give an approximate scheme
using collocation method to solve FIESK. Two fundamental questions concerning this
method: its stability and convergence are discussed. We show that the analytical
stability bounds are in excellent agreement with numerical tests. Comparison between
exact solutions and approximate predictions is made.

The dynamics of the thin layer which flows steadily between two vertical guide
wires was investigated but with zero shear stress at their bounding surfaces where the
gravity has no significant effect on the liquid film. We apply the Navier-Stokes
equations in two dimensional steady flows for incompressible fluid to a falling liquid
curtain and we present the derivation of the differential equation that governs such flow
and we obtain a solution for these equations which is valid for this liquid curtain , where
we restrict our works to the case where the domain under consideration is long and thin,
the solution of the governing equation is obtained by analytical method, and in this case
there is a critical solution
1/ 2
)
2
( ) (

gc   for large

when the parameter

is equal to
zero, where
2
2 2
0 H
R
P

 
and which is identical to the case when the normalized
pressure
0 p
is equal to zero. Generally, we solve the equation when
p0
is not equal to
zero, and the thickness of the film increases as
 increases where
2 H


  .