Volume 8, Issue 4, Autumn 2013, Page 1-47


A non Monotone Line Search Method with VM Algorithm of 2nd Order Quazi-Newton Condition for Symmetric Non Linear Equation

Ivan S. Latif Qumri H. Hamko

Kirkuk University Journal-Scientific Studies, 2013, Volume 8, Issue 4, Pages 38-47
DOI: 10.32894/kujss.2013.87979

In this paper, we propose a new class of Quasi- Newton update based on the non monotone line search technique for solving non linear equation under suitable conditions the global convergence of the method is proved. Numerical experiments indicate that this new algorithm is practicable for the test problems.

Study of Relationship between Coalescence Efficiency and the Radius of droplets in Warm Clouds

Jawdet H. Mohamed Ahmed

Kirkuk University Journal-Scientific Studies, 2013, Volume 8, Issue 4, Pages 9-18
DOI: 10.32894/kujss.2013.87980

The study of collision and coalescence mechanism for water droplets in cloud has a large importance
because its represented major process in formation rain in warm clouds .
In this study the, the relationship between the efficiency of coalescence ( coa E ) and the radius of droplets
in warm clouds had been studied by taking different radius of large droplets ( R ) ranged between
(60 to 100m) with groups of small droplets ( r ) that has radius ranged by (5 to 20 m) because these
values represented nearly the range of radius of droplets occurred in warm clouds .
The results appears that coalescence efficiency proportional directly with the radius of large droplet and
inversely proportional with radius of small droplet

Determination of Uranium Concentration in Some Types of Cement Used in Nineveh Governorate Using CR-39 Detector

S. Y. Hassan

Kirkuk University Journal-Scientific Studies, 2013, Volume 8, Issue 4, Pages 1-8
DOI: 10.32894/kujss.2013.87981

This study has been carried out on six samples of local and imported cement to determine concentrations of Rn-222 and U-238. The study showed that the minimum concentration of both Rn-222 and U-238 was in the cement of Hamam- AL Aleel with 17.9kBq.m-3( 15.93 Bq.kg-1 ) and 1.29 ppm respectively, while the maximum concentration was in the Turkish cement with 60.3kBq.m-3 ( 53.6 Bq.kg-1 ) and 4.342 ppm respectively. The obtained results were within the range of the allowed values and have no influence on the health and environment.

A Gravity Survey and Data Interpretation of Tawke Structure (Iraqi Kurdistan Region)

Abdulwahab N. Al-dawoody

Kirkuk University Journal-Scientific Studies, 2013, Volume 8, Issue 4, Pages 26-37
DOI: 10.32894/kujss.2013.87982

In this study 780 gravity measurements were conducted in the Tawke area along the paved and accessible unpaved roads. The obtained gravity data was subjected to the necessary corrections and analyses qualitatively and quantitatively. For that purpose the Bouguer anomaly map was transformed analytically to regional and residual fields. Moreover two profiles trending NS were limited to a 2-D gravity models. The main structural features of the studied area as are recognized utilizing two main lines of evidence, namely, geological map and geophysical interpretations have one distinctive trend; it is the E-W Taurus trend. The Bouguer map of the Tawke area shows gravity high in the central part. It trends E-W. It is indicative of the main anticline. Two gravity lows indicating the two synclines bounding the structure from north and south are clearly shown. Six faults are inferred from gravity data. When inferred faults and gravity lows and highs are plotted on the geological map they show good agreement.
A considerable density contrast of 0.36 gm/cm3 was observed between the Jeribe, Ana, Pila Spi, and Avana formation group against Lower Bakhtiari, Upper Fars and Lower Fars formation group and used in the modeling of two profiles. One main positive and two negative features characterize these profiles. The positive anomaly represents Tawke Anticline, the south negative anomaly represents Khabore syncline and the other Zakho syncline.
Geological model for profiles show that the Tawke Anticline is an asymmetrical Anticline producing a structural trap by tilting of the Miocene formations comprising sealing rocks (Fatha Formation) and reservoir rock represented by the Jeribe carbonates. Two small faults on the northern limb of Tawke Anticline have indications on the surface as seepages of oil.

Synthesis of Some N1-Benzyl -6-(thio and alkyl or aryl thio) Uracil derivatives

Mohsin Omer Mohammad

Kirkuk University Journal-Scientific Studies, 2013, Volume 8, Issue 4, Pages 17-25
DOI: 10.32894/kujss.2013.87983

New series of N1-Benzyl -6-(thio derivatives) Uracils have been prepared by reaction of 6-chloro uracil [F3] with benzyl chloride in dimethyl sulphoxide in presence of sodium carbonate to yield N1-Benzyl-6-chloro uracil [F4].Heating of [F4] in ethanol with thiourea and treated with sodium carbonate to yield N1-benzyl-6-marcapto uracil [F5].Alkylation's of compound [F5] with different reagents a new series of uracils were prepared (F7 –F17) .The structures of synthesized compounds were elucidated by using some spectroscopic methods (IR, 1HNMR

Natural Convection in a Vertical Rectangular Enclosure

Manar Salih Mahdi

Kirkuk University Journal-Scientific Studies, 2013, Volume 8, Issue 4, Pages 1-16
DOI: 10.32894/kujss.2013.87984

In this paper an experimental work has been conducted to investigate the influence of heating the lower half and cooling the upper half of vertical surface of a rectangular enclosure on natural convection. The enclosure length is (100 cm) with a square cross section (10×10 cm). The tests are done for three mass flow rates (0, 0.003 and 0.03 kg/sec) and five heat fluxes (48, 187, 400, 706 and 1080 W/m2). The hottest region formed is observed at ( = 0.67) where the lowest Nux is found while the coldest region is observed at ( = 0.33) where the highest Nux is found. Increasing the water mass flow rate enhances the heat transfer. The same thing happens with increasing the heat flux. A correlation is found to relate Nu with Ra (Nu= 0.216 Ra1/4) for (4×105≤Ra≤4×106). Both the experimental results and the correlation found are compared with a previous work and fair agreement is found.

Synthesis of acetylenic mercpto uracil derivatives

Hala M. G. Alzahawy Farah Kh. H. ALjuboory

Kirkuk University Journal-Scientific Studies, 2013, Volume 8, Issue 4, Pages 19-28
DOI: 10.32894/kujss.2013.87985

Research has included the preparation of compounds of acetylenic mercpto uracil compounds. And for the preparation of these derivatives requests 4 - chloro uracil (1) and can be obtained (1) easily from the reaction of 2,4,6 - trichloro Pyrimidin with a mixture of diethyl aniline and phosphorus oxide, trichloro POCl3, after it has been obtained for compound 4 - Mercpto uracil (2) of the reactant compound (1) Thio urea and reflux the mix in the presence of ethanol and then were treated compound (2)with Propagel bromide to obtain a compound (3) 4 - Propyl thiouracil. On the other reactant compound has (1) with a solution of Mercpto acetic acid (SHCH2COOH) in Sodium hydroxide to obtain compound (5) 2,6 - Dihydroxy-4-pyrimidinyl thio acetic acid and then were treated compound (5) with Propagel alcohol to get propaynyl (2,6-dihydroxy-4-pyrimidinyl thio acetate) (6). and for the preparation of Mannich reaction , Acetylenic compounds (3) and (6) were treated with paraformaldehyde in Isopropyl alcohol and the mixture was heated a bit, then added Secondary amine with Copper chloride with continuous heating to obtain derivatives 4a-e and 7a-e.
The purpose of the preparation of these derivatives is to get a new uracil derivatives containing acetylenic amines possible to have a biological effectiveness