Table of content

kirkuk university journal for scientific studies

مجلة جامعة كركوك للدراسات العلمية

ISSN: 19920849 26166801
Publisher: Kirkuk University
Faculty: Science
Language: Arabic and English

This journal is Open Access

About

The Kirkuk University Journal-Scientific Studies (KUJSS) is an official publication of the Faculty of Science at the University of Kirkuk. It was originally published in 2006 with two issues per year. Currently the journal is published every quarter (4 issues a year) since 2013. KUJSS publishes original papers, technical and research papers, in different disciplines (Astronomy, Pure and Applied Physics, Computer Science & Engineering, Information Technology, Electronics & Communication, Electrical & Electronics Engineering, Mathematical Sciences, Science of Chemistry, Bio-Science Technologies, Earth Sciences, Geo-physics, and Remote Sensing). English and Arabic are the language used. All manuscript submissions must be made through the journal's online manuscript system at online submissions.
The visions, goals, and the mechanisms of our Journal is to publish scientific research sober in the areas of Applied and Pure Sciences and scientific research, scientific interest large to contribute to the development of various disciplines, which provides significant support to researchers in all scientific facilities to continue to support the development plans in Iraq.
Submitted papers will be reviewed by Technical Committees of the Journal. All submitted articles should report original, previously unpublished research results, experimental or theoretical, and will be peer-reviewed. Articles submitted to the journal should meet these criteria and must not be under consideration for publication elsewhere. Manuscripts should follow the style of the journal and are subject to both review and editing.

date of firist issue 2006
no.issue per year(4)
no.of issue published between 2006-2012 (12)issue



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Contact info

E-mail: kujss@uokirkuk.edu.iq
site: www.uokiruk.edu.iq/kujss

Table of content: 2016 volume:11 issue:1

Article
Spectrophotometric determination of Chlorpromazine Hydrochloride by oxidative coupling reaction with P-Bromo aniline using Ammonium Ceric Sulphate Dihydrate
التقدير الطيفي للكلوربرومازين بوساطة تفاعل الازدواج التأكسدي مع بارا-بروموانيلين بوجود كبريتات السيريوم الامونياكية

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Abstract

A new sensitive spectrophotometric method for the determination of chlorpromazine hydrochloride (CPZH) was developed. The method is based on an oxidative coupling reaction with p-bromoaniline using ammonium ceric sulphate dihydrate as oxidizing agent to produce a violet color, soluble in water, stable product and absorbs at 553 nm. Beer's law was in the linear range 2.5 - 30 μg/ml of CPZH, the molar absorptivity, Sandellʼs sensitivity index and detection limit were 6.5731 × 103 liter. mol-1.cm-1, 0.0541 μg.cm-2 and 0.1361 μg/ml respectively. The RSD value was 1.20 - 1.36 % depending on the concentration. This method was applied successfully to the determination of chlorpromazine hydrochloride in two pharmaceutical formulations (tablets and injection).


Article
A Developed Discrete Fourier Transform based Cryptosystem
نظام تشفير مطور معتمد على محول فوريه المتقطع

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Abstract

This paper provides a developed cryptosystem for data encryption based on using the Discrete Fourier Transform (DFT). The encryption side using the DFT method for performing the main security development that is considered as the main encryption process in the developed cryptosystem. The primary ciphered plaintext data must be prepared as a block of (N) data, and entered to the DFT part. The decryption side uses as an inverse DFT method, to get back the primary ciphered plaintext from the received cipher text. The proposed method applied to classical encryption method, and can be applied to a stream cipher method. The validity of the developed encryption process is illustrated through many numerical examples.


Article
The Role of Omentin-1 in Cardio-renal Syndrome
دور هرمون الاومنتين-1 في المتلازمة القلبية الكلوية

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Abstract

Acute heart disease patients often go on to develop worsening renal function, termed as a cardiorenal syndrome(CRS). Cardiorenal syndrome is defined as “disorders of the heart and kidneys where by acute or chronic dysfunction in one organ may induce acute or chronic dysfunction of the other. Methods: Omentin-1 were measured in 144 subjects including: 50 samples with cardiorenal syndrome, 25 samples with heart disease, 25 samples with kidney disease and 44 normal healthy . Results: A highly significant increase (p<0.0001) in the levels of omentin-1 with cardiorenal syndrome patients, a highly significant decrease in patients with heart disease and significant decrease (p<0.05) in patients with kidney disease group when compared with control group. There is no significant differences between males and females, while significant increase (p<0.05) in <50 years age groups in patients with heart cardiorenal syndrome and significant decrease (p<0.05) in <50 years age groups in patients with kidney disease when compared with 38-50 years age group. Conclusions Omentin-1 have higher diagnostic validity values in the current study, which may be useful as a diagnostic tool to identify recurrence of the cardiorenal syndromes.


Article
Studying the Effect of Adding Up To 6wt%Cu on Some Mechanical and Physical Properties of Pure Aluminum
دراسة تأثير اضافة النحاس لغاية 6Wt% على بعض الخواص الميكانيكية والفيزياوية للألمنيوم النقي

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Abstract

Aluminum and its alloys solidify in columnar structure with large grain size which results in deterioration of their surface quality and strength. Aluminum alloys with a wide range of properties are used in engineering structures. Copper has been the most common alloying element almost since the beginning of the aluminum industry, and a variety of alloys in which copper is the major addition were developed. In this work, the influence of pure copper addition to commercially pure aluminum hardness, compression strength and thermal conductivity were studied. Six different Al-Cu alloys with 1,2,3,4,5 and 6%Cu content were prepared and experimentally tested. It was found that adding up to 6wt%Cu led to linear increasing in Brinell hardness, compression strength and slightly increasing in the thermal conductivity of aluminum-copper alloys.


Article
EFFECTS OF GRADING LAYERS ON GaAs VERTICAL CAVITY SURVACE EMITTING LASER PERFORMANCE
تأثير الطبقات المتدرجة على اداء ليزر كاليوم ارسنايت ذات انبعاث سطحي لتجويف شاقولي

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Abstract

This study is an attempt to investigate the effect of grading layers thicknesses and doping on the distributed Bragg reflectors (DBRs) resistivity by using advanced numerical simulation (ISETCAD) . Various VCSEL with and without grading DBRs aredesigned. It was observed increasing the length of grading minimize the voltage drop on the device, especially for p DBR. And total resistance of the device can be further lowered if all grading layers are all highly doped.


Article
Growth Hormone and Some Other Parameters Estimation in Thalassemia major Patients
قياس مستوى هرمون النمو و بعض المعايير الاخرى لمرضى الثلاسيميا الكبرى

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Abstract

This study is a cross-sectional study, included forty eight male subjects, during the period from the beginning of December 2013 to the beginning of April 2014 at Azadi teaching Hospital in Kirkuk City in Iraq. Questionnaire was administered, patients were examined, blood sample was collected and examined, data gathered and analysis (SD, T test & P value and Pearson correlation was employed for analysis of the relationship between variables). Growth hormone (GH), Serum Ferritin(SF), Hemoglobin (Hb) and packed cell volume(PCV), also body weight &height as well as body mass index were evaluated in 33 male patients (aged 10–20 years old) with β thalassaemia & in 15 subjects at the same age and sex as a control group. This study revealed that there was highly significant decrease in all parameters in thalassemic patients (except serum ferritin was highly significant increase in patients) as compare with controls (P< 0.001). Positive correlation found between GH and both Hb and PCV, while negative correlation was found between GH and ferritin level.


Article
FPGA Implementation of Wavelet Filters for DWMT Systems
FPGA تنفيذ مرشحات المويجة لأنظمة الارسال متعددة الترددات باستخدام باستخدام

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Abstract

Discrete Wavelet Multi-Tone (DWMT) systems acquired attention due to their high spectral efficiency and high data rates with respect to FFT-based multitone transmission systems. The complexity of the overall system is directly related to that of the elemental building block. In the literature, wavelet filters are designed subject to constraints for minimum interference. The structure of a Minimum Interference Wavelet Filter (MIWF) is very simple even for high filter orders. In this paper, DWMT systems using a two-branch wavelet filter bank in the transmitter and its inverse at the receiver are implemented using the Spartan XC3S1200E FPGA. The details of system implementation are presented for MIWF, Daubechies, and Coiflet wavelet filters. The tests show that, with respect to the other tested systems, the MIWF-based system is simpler, faster and capable to preserve its


Article
Contamination of soils public places and children'splaygrounds by Toxocara canis and Toxocara cati eggs in Saladdin province
تلوث ترب الأماكن العامة وملاعب الأطفال ببيوض السهمية القطية والكلبية في محافظة صلاح الدين

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Abstract

To determine the prevalence of Toxocara canis and T. cati eggs in public places and children playgrounds, 783 soil samples were collected from 15 different regions in Saladdin provinces during July 2012 to June 2013 . Toxocara species eggs are found in 192 samples 24.52% . The Contamination with these eggs is observed in all sites like Tikrit &Baiji & Samaraa & Al-Dujail district , Al-Alam & Amerli &Al-Senia & Al-Ouja region ,the village of Albu-Ajil . The soils of Gardens have more contaminated than bare soils . Higher contamination rate noticed in February 55.71% and March 52.30% while it decreased to lower level in June 2013 14.75%


Article
Histological, Morphological and Sonographical Study of age related changes in Human Pancreas
دراسة نسيجية وشكلية و الموجات فوق الصوتية بالتغيرات المرتبطة بالعمر في بنكرياس الإنسان

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Abstract

Ageing stress induce an effect on each body cell causing degeneration and malfunction as consequence this appear in different investigation degree of views so this study was mad to investigate the anatomical, histological and sonographical changes during aging process in pancreas. The pancreas specimens were divided into five groups (four pancreas specimens ) according to cadaver age ranging from 21- 70 years, to five groups : group A (21-30 years), group B (31-40 years), group C (41-50 years) ,group D (51-60) and group E (61-70). The pancreas were inspected grossly for their shape and Location. The morphometrics of pancreas in the present study was 20.3±2.3 (cm) as a maximum mean length in group B and 15.6±0.9 (cm) as a minimum mean length in group E. The weight of pancreas in this study a maximum mean weight in group B was 122.41±0.27 (gm) and minimum mean weight in group E was 75.52±0.28(gm). Microscopically, pancreatic section showed that, the pancreas was covered by a thin fibrocollagenous connective tissue capsule from which septa extend into the gland dividing it into lobules. Nerves and blood vessels extended within the septa, the lobules contain exocrine tissue and endocrine tissue . Diameter of pancreatic acini ranged from 49±15 (µm) in head region of group B to 18±2 (µm) in the tail region of group E . The diameter of Islet of Langerhans ranged from 102±2 (µm) in head region of group B to 48±15(µm) in the tail region of group E, thickness of pancreatic septa in the head was 86±3 (µm) as a maximum value in group E and in the tail was 36±5 (µm) as a minimum value in group A . In addition, an ultrasonographic pancreas gland inspection were performed on forty volunteers who were similarly divided according to age into five groups (eight individuals for each), according to age, the ultrasound inspection concerned with length and width of gland . The results showed that the age have a reliable degeneration effect specially after 40 years old, other further investigation on different population and further tools help to show more details about age related changes.


Article
Synthesis and Characterization of New Copper (II) Complexes with mixed ligand of Heterocyclic Dithiocarbamates and 4-picoline,luitidine ,en,(1-10)phen,pph3
تحضير وتشخيص معقدات جديدة للنحاس الثنائي مع مزيج من ليكندات ثنائي ثايوكاربميت و4- بيكولين, ليوتدين ,اثلين ثنائي امين ,(1-10) فينوثرولين ,ثلاثي فنيل فوسفين

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Abstract

تم تحضير معقدات جديدة للنحاس تتضمن ليكندات مختلطة صيغتها العامة [Cu(4-Hydrpipdtc)2L2] و [Cu(4-methylpipdtc)2L2] حيث ان (4-Hydrpipdtc), و(4-methylpipdtc) = 4-hydroxylpiperidinedithiocarbamate و 4-methylpiperidinedithiocarbamate على التوالي و L = 4-picoline ,luitidine ,en ,(1-10)phen,PPh3وشخصت المعقدات المحضرة بواسطة تحليل العناصر وقياسات التوصيلية واطياف الاشعة تحت الحمراء والمرئية والفوق البنفسجية وقياسات الحساسية المغناطيسية ومن النتائج تم اقتراح الشكل المربع المستوي للمعقد بس داي ثايوكاربميت نحاس (II) والشكل ثماني السطوح للمعقدات الاخرى.


Article
Synthesis , characterization and antimicrobial activity of shiff and mannich bases of uracil derivatives
تحضير وتشخيص ودراسة الفعالية البايولوجية لبعض قواعد شف ومانخ المشتقة من يوراسيل

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Abstract

In the present work some Shiff bases (1a,b,c,d)were syuthesized using phenyl alanine with aniline by microwave irradiation. Aseries of mannich base (2a,b,c,d) were prepared by the reaction of (1a,b,c,d) with uracil in the presence of formaldehyde.The newly synthesized compounds were characterized on the basis of elemental analysis,I.R and H1NMR. All the synthesized compounds were tested for their antibacterial activites and antifungal activities.


Article
Taxonomic study of Brachynema virens (Klug, 1845) (Heteroptera: Pentatomidae) in Kurdistan region - raq.
Brachynemavirens (Klug, 1845) دراسة تصنيفية للنوع (Heteroptera: Pentatomidae) في أقليم كوردستان- العراق

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Abstract

This study deals with taxonomy of Brachynema virens(Klug, 1845)which collected from different localities of Kurdistan region-Iraq, including Erbil, Suleimanya and Duhok Governorates from the mid of April to the end of August2014.Some important parts ,metathorax scent gland, male and female genitalia have been illustrated and drawn .The results showed that the evaporatoria metathoracic scent gland well defined ;pygophore slightly longer than broad; paramere somewhat T-shaped; Spermathecal bulb round, without finger-like processes.Localities, date of collection and host plants were mentioned.


Article
Study the activity of Tryptase And Beta 2- Microglobulin Levels In the Sera of Patients With Chronic Renal Failure And Rheumatoid Arthritis
دراسة فعالية مستويات أنزيم التربتيز وبيتا2 مايكروكلوبيولين في مصل المرضى المصابين بالفشل الكلوي المزمن والتهاب المفاصل الرثوي

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This work was mainly designed to study the levels of Mast Cell Tryptase & Beta 2- Microglobulin in serum of patients with chronic renal failure (CRF), which they were in the end stage of renal disease (ESDR) depending on hemodialysis (HD) and chronic renal failure patients with Rh.arthritis called ( renal Osteodystrophy). Blood samples were collected from Kirkuk General Hospital, with their ages between (20-70) years. This study included (135) blood samples including (85) sample for patients with chronic kidney failure and (25) samples for patients with kidney failure and Rh.arthritis in addition to (25) samples from subjects apparently healthy as control group. Results were obtain A highly significant increase (p<0. 001) in the levels of tryptase and Beta2 -Microglobulin in serum of patients with Chronic renal failure and renal osteodystrophy disease comparwith normal individuals


Article
Mercury (II) removal from aqueous solutions using chemically modified polyacrylamide and its copolymers
إزالة ايونات الزئبق (II) من المحاليل المائية باستخدام البولي أكريل أمايد المحوّر كيميائيا و بعض بوليمراته المشتركة

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Some of acrylamide copolymers were used to mercury removal from aqueous solutions of HgCl2. The uptake capacity of these prepared copolymers was calculated. The prepared copolymers were identified spectroscopicaly using infrared spectroscopy, the analysis of the resulting treated HgCl2 solution to know the Hg (II) concentration was obtained by using atomic absorption.


Article
Design and Implement Privet Chatting Over Bluetooth for Wide Area
تصميم وتنفيذ برنامج محادثة جماعية خاصة باستخدام البلوتوث ولمدى اوسع

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Abstract

The mobile applications have become one of the important applications in human life, and it was widely used during the last ten years. Mobile devices can be used to do various tasks, such as browsing the internet, sending or receiving emails, and performing other tasks. Bluetooth technology is considered as one of the important specifications that were added to mobile phones during the current century where the user can use it for data and image transmission and others. One of the important applications of Bluetooth, which appeared in the last years, is the conversation via Bluetooth where users can hold short conversations using this technique. One of the most important benefits of Bluetooth technology is that it's free to send and receive messages. While the disadvantages of this application is that it is short-term, since users must be within the scope of the Bluetooth service which is (7 - 9 meters) to be able to send messages and use it. In this paper, we will design and implement a private conversation via Bluetooth software which has the ability to work within biggest scopeby taking advantage of the properties of the (Scatternet). Each user of the application can be a crossroads for the other users. In other words, if there is, for example, users (a) and (b) 7 meters away from each other, and a third user (c) appeared within 12 meters of the first user (a). In this case, the third user (c) can be connected to the first user through the user (b). In other words, the second user (b) would be an intermediary between the first user (a) and the third user (c). So, we have been solved the distance limit problem for using the Bluetooth application. In addition, the users are now able to chat as a group (not just peer-to-peer) in a private room with a wide range using the piconet and scatternet characteristics. Netbeans 5.5, Java 2 Micro Edition (J2ME), Bluetooth API (JSR-82), Nokia Pc Suites are the tools and technologies that have been used through building this application.

Keywords

Bluetooth --- Piconet --- Scatternet --- Netbeans --- Bluetooth --- Piconet --- Scatternet --- Netbeans.


Article
Air Quality Index (AQI) for Kirkuk City
مؤشر جودة الهواء لمدينة كركوك

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Urban air pollution problem is a major concern in many large cities and becomes increasingly critical around the world. The effects of urban air pollution on public health are being felt worldwide. Pollutants can destroy sensitive tissues (in people, animals and plants). Kirkuk city is considered as the main petroleum city in Iraq. The recent year's rapid growth of this city has resulted in a significant increase in environmental pollution. The aim of this research was to measure some important pollutant concentrations such as (SO2, NO2, CO, O3, and PM2.5, PM10) in Kirkuk city. The studied area contains (18) sites which are taken for the period (January – May, 2014), the coordinate of each individual sample location was determined by Global Position System (GPS) (Garmin navigator). Geographic Information System (GIS) was utilized to map urban air pollution dispersion over Kirkuk city. Air Quality Index (AQI) for Kirkuk city is calculated using six main pollutants for five months of measurements. The average AQI of Kirkuk city was found to be polluted to unhealthy (AQI values = 101 – 200).


Article
Collective Excitations of 14N and 10B Nuclei
الإستثارة التجمُعيّة للانوية 14N و 10B

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The nuclear structure of 14N and 10B nuclei are studied in framework two collective excitation approximations. The first approximation is hole-hole Tamm-Dancoff Approximation (hh TDA) and the second is hole-hole Random Phase Approximation (hh RPA). All possible single body states of the allowed angular momenta are considered in the 1s, 1p, 2s-1d, and 1f shells. The Hamiltonian is diagonalized in the presence of Warburton and Brown interaction (WBP). The calculated compared with experimental data for the energy levels and form factors of electron scattering


Article
Preparation of Some Mercurated Dowex Resins and Study of Their Industrial Applications For Desulfurization
تحضير بعض راتنجات الدويكس الحاوية على الزئبق و دراسة تطبيقاتها الصناعية في إزالة مركبات الكبريت

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During this research some chemical modifications especially )mercuration) have been done on Dowex resin. It is known that the sulfur dioxide gases are the main source of acid rain and air pollution, result from the conversion of fuels containing sulfur compounds in combustion engines. As a result of environmental impact, strict requirements on low sulfur content in fuels are becoming prominent throughout the world. This study was carried out to remove dibenzothiophene from model light oil (benzene containing DBT, 3080 ppm. sulfur content) by using the mercurated Dowex.The analysis of the resulting treated DBT solution to know the sulfur concentration was obtained by using atomic absorption The mercurated polymers were identified spectroscopicaly using infrared spectroscopy.


Article
A STUDY OF OPTICAL PROPERTIES OF PHOSPHATE AND TELLURITE SEMICONDUCTING OXIDE GLASSES
دراســة الصفات البصرية لزجاجيات اكاسيد الفوسفات والتلريوت الشبه الموصلة

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Glass samples in the system of (P2O5)75-(CuO)25-x-(CdO)x/(P2O5)75-(CuO)25-x-(ZnO)x/(P2O5)75-(CuO)25-x-(V2O5)x/(P2O5)50-(TeO2)50-x-(CdO)x/(P2O5)50-(TeO2)50-x-(ZnO)x and (P2O5)50-(TeO2)50-x-(V2O5)x glasses of different compositions where (x = 0, 5, 10, 15,20) were prepared by the melt-quenching technique. Optical absorption spectra of different compositions were recorded in the visible and UV regions and optical parameters such as optical energy gap (Eopt) and band tails (Eo) were determined by Urbach formula, the measurements for phosphate glasses of optical energy gap (Eopt) (P2O5)75-(CuO)25-x-(CdO)x have been determined and founded between (3.75-4.185) eV, (P2O5)75-(CuO)25-x-(ZnO)x the value of optical energy gap is between (3.75-4.25)eV, (P2O5)75-(CuO)25-x-(V2O5)x the (Eopt) is between (3.75-4.2)eV. for tellurite glasses the measurements of optical energy gap (Eopt) of (P2O5)50-(TeO2)50-x-(CdO)x have been determined and founded between (3.825-4.25)eV, (P2O5)50-(TeO2)50-x-(ZnO)x the (Eopt) is between (4.035-4.2)eV, (P2O5)50-(TeO2)50-x-(V2O5)x the value of optical energy gap is between (3.875-4.335)eV, It was found that the fundamental absorption of these glasses is dependent upon compositions and arises from forbidden indirect transitions. The most satisfactory results were obtained with the theory Davis and Mott for forbidden indirect transitions


Article
EXPERIMENTAL STUDY TO FIND ALTERNATIVE DEMULSIFIER TO TREAT EMULSION CRUDE OIL
دراسة تجريبية للإيجاد بديل كاسر الاستحلاب لمعالجة النفط الرطب

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When crude oil is produced from an oil field well, it is generally accompanied with variable proportions of water, which makes the separation of water from crude oil commercially difficult. In this research it was found the best alternative demulsifier (belongs to the researchers) from the demulsifiers (unknown chemical formula) that is used in the wet oil treatment. Which is highly effective and less costly in economic terms of their counterparts. The crude oil that we made our research is taken from Jamboor field in Iraq. (Specific gravity = 0.6417) and the water quantity 0.18 ml, if we used organic component Benzene with demulsifier (special formula belongs to researchers), we will see that the quantity of water in crude 0il is (0.17 ml).


Article
Capture of CO2 from power plants Using Different Adsorbent materials
التقاط CO2 من محطات توليد الطاقة باستخدام مواد مازة مختلفة

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Emission of carbon dioxide from power plant has direct effect to increase the warm of earth due to combustion of fossil fuels by power plants. Pressure swing adsorption is an economic process used to control CO2 emission to atmosphere. In the present study single column of 1m length and 2.54 cm inside diameter used to study the breakthrough time curve of CO2/N2 separation using zeolite (13X), carbon molecular sieve (CMS), and activated carbon (AC). The range of adsorption pressure was (1-3) bar at ambient temperature and product flowrate of about 0.5 ml/min. The results showed significant separation of CO2 and low level of CO2 observed in the product line of the adsorber column. Longtime of breakthrough curve observed by zeolite 13X. Regeneration of Zeolite 13X by heating at 350 Co for 12houre increased breakthrough time from 70 minutes to 175 minutes. Maximum purity of the CO2 at the vacuum pump product line was 87% and Zeolite 13X was better than others in spite of steeper mass transfer zone observed by activated carbon adsorbent.


Article
Tunable optical cavities for wavelength Indications in Gas Laser
الطول الموجي كمرجع للحصول علي تجويف بصري انظباطي في الليزر الغازي

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Explain an all-optical tunable detention in gas laser based on wavelength conversion wavelength reconversion. The use of stable, calibrated optical reference cavities to equipping interferometer users with more exactly. Various resonance wavelengths of cavity were resolved by frequency measurements in a vacuum by use of a gas laser comb followed by corrections to account for atmospheric pressure and cavity temperature. A purpose of a new stable cavity is discussed that allows for the longitudinal mode index to be determined by difference-frequency measurements between the S and P polarized modes. For a wide range of signal pulse interval (ps to 10 ns), an output signal wavelength and bandwidth that are the same as that of the input.


Article
Morphometry and Histological Architecture of 7 days Human Neonate cerebral cortex ( A Comparative study of Frontal and Occipital lobe )
الهيكلية النسيجية والشكلية لعمر 7 أيام في قشرة دماغ حديثي الولادة للإنسان (دراسة مقارنة في الفص الجبهي والفص القفوي)

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Four samples of brain at age 1-7 days postnatally were obtained, fixed by 10% neutral bufferedformalin immediately after removal from the skull, for 24 hrs. Specimens from frontal and occipital lobes were taken and immersed in formalin 10% for 48 hrs. and processed histologically to obtain slides at 6 micrometer thickness and stained with hematoxylin and eosin (H&E). The present results clarify that the mean brain measurement from the frontal to occipital pole was177.0 mm, while the measurements of the frontal and occipital cortices were 2.680 & 2.903 mm respectively. The histological technique was done to obtain slides for examination under light microscope. The result indicated that the frontal and occipital region of cerebral cortex formed by six layers, molecular, external granular, external pyramidal, internal granular, internal pyramidal and multiform layers.


Article
THE APPLICATIONS EMPLOYED TO DESIGN A NEW KIND OF FILTER USING THE ACTIVE ELEMENT (VDBA)
التطبيقات المستخدمة في تصميم نوع جديد من المُرَشِحات باستخدام العنصر الفعال (VDBA)

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The paper presents a new configuration of biquad filters using the well known active element (VDBA) Voltage Differencing Buffered Amplifier. The proposed item contains properties such as high input impedance terminal and low output impedance terminal which allow perfect performance in voltage circuit fields. In addition, the circuit is used without exterior resistor because of the transconductance gain that exists in VDBA. The proper method to design such a filter is satisfied by using both active and passive elements. In this paper, two filter applications are designed based on Multi Inputs Single Output (MISO) filter configuration. The first proposed filter uses two VDBAs and two capacitors. Whereas, the second fılter contains two VDBAs, two capacitors and one resistor. Both circuits satisfy the voltage mode (low pass, band pass, high pass, band stop, & all pass) filters. The low output impedance of biquad filters award more cascadabilities for the voltage circuit. Moreover, the matching conditions of the conclusive elements are not needed. The adjustment in the resistance employed by the second biquad filter developed the quality factor to be as independent natural frequency. The introduced biquad filters are tested and simulated in LTSPICE simulator to confirm the theoretical concepts. The simulation results agree with the main theoretical concepts


Article
A study on the dielectric properties of La+3 doped nickel ferrite
دراسة الخصائص العزلية لفرايت النيكل المطعمة بعنصر La+3

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Abstract

In the present work, the Ni-La ferrite chain (NiLaxFe2-xO4) with (x=0.0-‎‎ 0.2),were synthesized using sol-gel auto-combustion as a modern chemical ‎methods. Nitrates, citric acid and ammonia were used ‎in order to get ferrite nano powders at temperature of (200)oC, which characterized a higher dispersion ‎and homogeneity with particle size in the range of (20-39) nm. The dielectric properties are measured using (LCR) meter in the frequency ‎range of (50Hz –5MHz). Dielectric constant (εr'), the loss tangent ‎‎( tanδ ) and the loss factor (εr′′) are decreases with increasing frequency, while the Conductivity (σa.c) increases ‎with increasing the rare earth ion (La) concentration in Ni ‎ferrite.


Article
Integrated organic geochemistry with palynofacies analysis of the Chia Gara Formation in the Kirkuk and Hamrin oilfields, North Iraq
تكامل الجيوكيمياء العضوية مع السحنات البالينولية الدقيقه لتكوين جياكارا في حقلي كركوك وحمرين, شمالي العراق.

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Abstract

The idea of the present work was to combine Rock-Eval pyrolysis and palynofacies analysis in an integrated approach to study 51 source rock cores and cuttings samples collected from the middle Tithonian- Berriasian Chia Gara Formation, in well K-109, Kirkuk Oilfield and well Hr-1 drilled in the Hamrin Oilfield, north of Iraq to evaluate quantitatively and qualitatively the nature of sedimentary organic matter, generation potential and assess thermal maturity of the studied formation in both wells. Rock-Eval pyrolysis and palynofacies data indicate that the Chia Gara Formation in well K-109, Kirkuk Oilfield has kerogen type III/II and II/I and the amorphous organic matter AOM is dense and amber brown to very dark brown in color assigned to type C and D which reflects mature to overmature stage (gas-oil prone). On the other hand, the source rock samples of the Chia Gara Formation encountered in well Hr-1, Hamrin Oilfield has kerogen type II/III and II/I and the AOM is dense rounded, yellow to yellowish brown typeD, mature and is oil-gas prone. The regional tectonic movements and thermal history may cause the diversity in kerogen type and the subtle color variation in the AOM from the Chia Gara Formation in the Kirkuk Field in the north to Hamrin Field in the south.

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