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Article
Some Fixed Point Theorems For Various Types Of Expanding Self Mappings In Partial Cone Metric Space
بعض مبرهنات النقطة الصامدة لأنواع متعددة من تطبيقات ذاتية في فضاء متري شبه قرصي

Author: Tamara. Sh. Ahmed تمارا شهاب احمد
Journal: basrah journal of science البصرة للعلوم ISSN: 18140343 Year: 2016 Volume: 34 Issue: 2 A Pages: 94-104
Publisher: Basrah University جامعة البصرة

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Abstract

In this paper , We shall prove the existence of fixed point for expanding self mapping in the setting of complete partial cone metric space with assumption that the cone is normal and present some results in this setting of generalized cone metric space .Our results are generalizations of other results.

في هذا البحث تم برهان وجود النقطة الصامدة لتطبيقات ذاتية موسعة لفضاء متري شبه قرصي كامل بأفتراض ان القرص المستخدم هو طبيعي وقد قدمنا بعض النتائج لأستخدام هذا الفضاء. نتائجنا هي تعميمات لنتائج اخرى.


Article
Compactness of Fuzzy Cone Metric Spaces

Authors: Fadhel S. Fadhel --- Amer A. Abdullah
Journal: Al-Nahrain Journal of Science مجلة النهرين للعلوم ISSN: (print)26635453,(online)26635461 Year: 2016 Volume: 19 Issue: 4 Pages: 143-150
Publisher: Al-Nahrain University جامعة النهرين

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Abstract

Cone metric spaces may be considered as a generalization of determinist metric spaces or fuzzy metric spaces. In this paper, we will construct fuzzy cone metric space using different approaches, which is based on the definition of fuzzy points, and then study different types of compact subsets of such spaces, as well as, the relationship among them.

النظام المتري الكون يعتبر تعميم للنظام المتري العاديوكذلك للنظام المتري الضبابي. في هذا البحث سوف نقدمالنظام المتري الضبابي المخروطي بواسطة تعريف النقاطالضبابية, وكذالك سندرس عدة انواع من الت ا رص لهذاالفضاء, وكذالك د ا رسة العلاقات بينهم.


Article
In vitro evaluation of sealing ability of matched-taper single cone obturation with an electrochemical method.

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Abstract

Abstractwidespread use of rotary Nickel-Titanium systems has caused manufacturers toproduce gutta-percha cones that match the taper of the canals prepared with thesesystems. The aim of this study was to use electrochemical method to compare theapical sealing ability of taper single-cone, Thermafil obturation in canals preparedwith ProTaper and ProFile instruments. Forty extracted human mandibular premolarwere divided into 2 groups. All canals in group (A) prepared with ProFile, while allcanals in group (B) prepared with ProTaper. Each group subdivided into twosubgroup according to the method of obturation, (Thermafil and matched taper- singlecone).The apical leakage in these groups was evaluated using an electrochemicalmethod. T-test showed a non significant difference between Thermafil and matchedtaper-single cone obturation technique in the same group. A significant difference wasfound between ProTaper and ProFile group in both obturation techniques.


Article
Positive Solution For Eigen value Problems
الحلول الموجبة لمسائل القیم الذاتیة

Author: Saleh . M . Hussein
Journal: Journal of university of Anbar for Pure science مجلة جامعة الانبار للعلوم الصرفة ISSN: ISSN: 19918941 Year: 2010 Volume: 4 Issue: 2 Pages: 78-81
Publisher: University of Anbar جامعة الانبار

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Abstract

Studying the boundary value problem :-Values of the parameter (  ) are determined for which this problem has a positive solution. Themethods used here extend recent works by a simple application of a Fixed Point Theorem in cones . Ishow the existence of at least one positive solution of this boundary value problem

یدرس هذا البحث المسألة الحدودیة التالیة :-التي تمتلك عندها المسألة الحدودیة حل موجب . استخدمت في بحثي هذا تطبیق نظریة النقطة الثابتة في (  ) ومعرفة قیم المعلمةالمخروط وتوصلت إلى أن هذه المسألة الحدودیة تمتلك على الأقل حل واحد موجب .


Article
MIXED CONVECTION HEAT TRANSFER IN TRUNCATED CONE ENCLOSURE AS SOLAR CONTAINER WITH INTERNAL CENTERED TRIANGLE OBSTACLE

Authors: Kadhum A. Jehhef --- Mohamed A. Siba
Journal: KUFA JOURNAL OF ENGINEERING مجلة الكوفة الهندسية ISSN: 25230018 Year: 2018 Volume: 9 Issue: 4 Pages: 286-307
Publisher: University of Kufa جامعة الكوفة

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Abstract

In this study, the mixed convection heat transfer of the air inside a truncated cone enclosure with aspect ratio of (0.75, 1.75, 2, 2.45 and 2.65) with centered triangle obstacle height varying by (0, 2.5, 5, 7.5, 10, 12.5 and 20 cm) and the heated wall inclination angles of (20o, 30o, 40o, 50o, 60o), the Richardson number in the range of (7 to 11) was investigated numerically. The results are addressed to automotive a suggested solar container with titled solar collector. The heat transfer from the heat source (inclined solar collector) of the enclosure walls is investigated for mixed convection as interaction of the forced convection flow between the inlet and outlet port in the bottom wall. The parameters of heat source, Reynolds number, obstacle height, enclosure aspect ratio, and left and right walls titled angles are considered in this work. The numerical simulation of the problem is carried out using commercial CFD code. The results are given in terms of the streamlines, isothermal, and the enclosure Nusselt number that characterizes the heat transfer from the heat source and from the interior fluid to the enclosure walls, respectively. The results show that the interaction of the main flow and the flow at the heated walls and the buoyancy force at the heated walls increased by using a triangular obstacle and by increasing the obstacle heights, it increased by 20% when using obstacle at position of (h=5 cm). Also, it is found that the Nu increased with increasing Re and the wall heat flux. The Nu increased with increasing Ri in the case of using (h=0 and 5 cm) but it decreased slightly in the other cases and showed that the minimum value of Nu present at a heated wall inclination of θ=50o but the maximum value at θ=30o.


Article
Validity of Hounsfield Units in Skyview Cone Beam Computed Tomography to detect bone densities at different jaw sites during implant insertion

Author: Dr. Amal R.S. Mohammed, B.D.S., H.D.D., M.Sc. Rad. د. امل رؤوف
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2016 Volume: 13 Issue: 1 Pages: 105-111
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

AbstractBackground: The purpose of this study was to evaluate the bone densities byHounsfield Unit at jaw sites in sky view cone beam computed tomography andto compare these values to the optimal bone densities proposed in the literature.Materials and Methods: Thirty-six patients, 15 males and 21 females were assessed;CT data for different jaw sections and regions were compared using (t-test).Results: The means of bone density in all regions are higher in male than female. Themean bone density in the anterior mandible is higher ; the mean bone densitiesin the four jaw regions decreased in the following order in female or male orgeneral ( anterior mandible > anterior maxilla > posterior mandible > posteriormaxilla ) .Conclusion: The bone densities assessed by HU fell into the range of optimal bonedensities proposed in the literature.


Article
Radiological Assessment of Mandibular Retromolar Canal (MRMC) Using CBCT-Radiographs in a Sample of Iraqi Patients

Authors: Jamal Abid Mohammed جمال عبد محمد --- Zainab H. Al-Ghurabi زينب الغرابي
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2016 Volume: 28 Issue: 3 Pages: 99-103
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Because of its clinical and surgical importance and lack of precise information about this rare andimportant anatomical landmark, this study was designed to detect the presence, configurations and length ofMandibular Retromolar Canal (MRMC) with aid of CBCT visualization.Materials and methods: In this retrospective study the data was obtained from Specialist Health Center in AL-Saddercity in Baghdad for (100) patients with 200 inferior dental canal, all of them referred to CBCT scan (Kodak 9500,French origin). The scanning was done with tube voltage 90 kVp, tube current with 10mA and exposure time was 10s., the field of view was measured with 5cm x 3.7cmwith 0.03mm voxel sizeResults: In the present study the prevalence of MRMC was 12% , 2 patients have ( two ) bilateral MRMC and 10patients have a unilateral canal, there was asignificant difference between two sides (left and right), the right sidewas 64.29% and left 35.71%, regarding to gender also there was a significant difference , female 33.3% and male66.7%. In this study there were three types of MRMC and there was a significant difference between them, the meanlength (hight) was 11.78 mm and mean horizontaldistance from canal to distal surface of the second molar was 18.5mm.Conclusions: MRMC also detectedin this study within the global percentage and configurations and should betaken with consideration in oral surgical procedures and radiological interpretations.


Article
An Assessment of Sagittal Condylar Position of TMJ Dysfunction in Centric Occlusion by Using Cone Beam Computed Tomography

Authors: Lamia H. Al-Nakib لمياء حامد النقيب --- Ako Omer Abdullah --- Saeed A.Abd Al-Kareem --- Sangar Hamid Ali
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2016 Volume: 28 Issue: 2 Pages: 58-62
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Temporomandibular joint (TMJ) is a compound articulation formed from the articular surfaces of thetemporal bone and the mandibular condyle.CBCT imaging of TMJ is that it allows accurate measurements of thevolume and surface of the condyle. The aim of the study is to assess the sagittal position of mandibular condyle inpatients with temporomandibulardysfunction using Cone Beam Computed Tomography in centric occlusion.Materials and Methods: CBCT images for all patients were obtained in an upright position using New Tom GianoCBCT with different field of view (11 x 8), (11 x 5), and (8 x 8) and exposure factors was changed accordingly usingNNT version 5.1 software for sagittal reconstruction, anterior, superior and posterior joint spaces was measured.Results: There was a significant change in the anterior, posterior and superior joint spaces when compared to normalfunctioning TMJ. The sagittal position of the condyle in glenoid fossa could be affected by TMJ dysfunction and itwould be positioned centrally but slightly inferior to the normal position according to the results of this study. Therewas no significant difference in the sagittal condylar position in glenoid fossa between sexes. There was significantdifference in the value of anterior, posterior and superior TMJ spaces between right and left sides of the mandible inboth normal cases and TMJD.Conclusion: Sagittal section of Temporomandibular joint revealed that TMJ dysfunction affects the joint spaces insagittal plane. It means significant changes occur in the value of anterior, posterior and superior joint spaces whencompared to normal functioning TMJ


Article
Cone Beam Computed Tomography in an Evaluation and Diagnosis of Anatomical Variations and Pathological Lesions in Maxillary Sinus Prior to Maxillary Sinus Lift Surgery

Author: Zainab H. Al-Ghurabi زينب حسن الغرابي
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2016 Volume: 28 Issue: 1 Pages: 99-102
Publisher: Baghdad University جامعة بغداد

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Abstract

Abstract: Thorough assessment of the maxillary sinus is very important. Recently 3-dimensional image with ConeBeam Computed Tomography (CBCT) is very dependable in Maxillary Sinus diagnosis. The aim of this study is to:shade light on the role of (CBCT) diagnosis of the maxillary sinus anatomical variation and pathological findingamong smokers and nonsmokers prior to maxillary sinus lift techniques.Materials and Method: In this study 60 males with age ranged between 20-50 years old, referred for (CBCT)assessment of maxillary sinus in the Specialist Health Center of Al-Sadder city. The scanning were performed usingKodak 9500 (CBCT), the KV was 90, mA10 and scanning time 10 s. Voxel size 0.3mm with( DICOM ) software on amultiplaner reconstruction window in which the axial, coronal and sagittal plane could be visualized in 0.3 mminterval, 40 were smokers and 20 nonsmokers, both sides were evaluated to assess the presence of septa, maxillarysinus membrane (Schneiderian membrane)thickening, complete opacification and adenoid polyp.Result:The maxillary for nonsmoker patients (20) patients were clean and have no any pathological or anatomicalchanges, among smoker patients, it was found that 7 (17.5%) of them had a clean maxillary sinus, 25 (62.5%)patient from smokers, the mucosal thickening was clear and measured more than 4 mm, 20 (80%) of them bilateralmaxillary sinus were involved and 5 (20%) of them have a unilateral thickening, 6 (15%) of the smoker patient havebilateral involved adenoid with max sinus, and 2(5%) of them have full opacification., no septa was found in thisstudy.Conclusion:Cone Beam Computed Tomography(CBCT)was themost useful technique to diagnose maxillarysinusbefore maxillary sinus augmentation, an evaluation ofCone Beam Computed Tomography(CBCT)scans beforeimplant surgery or sinus augmentation procedures has extreme clinical importance in evaluation of anatomicstructures, such as thickening of the Schneiderian membrane and presence of pathological lesion such as adenoidpolyp.


Article
Study The Spin Down Luminosity And Flux Density For Pulsar Stars By Using Hallo Cone Model
دراسة تباطؤ اللمعانية وكثافة الفيض للنجوم النابضة باستخدام نموذج الاسطوانة الضوئية

Authors: Sundus A. Abdullah سندس عبد العباس عبدالله --- Ban Sabah بان صباح --- Marwa Muder مروة مضر
Journal: Iraqi Journal of Science المجلة العراقية للعلوم ISSN: 00672904/23121637 Year: 2016 Volume: 57 Issue: 3B Pages: 2161-2172
Publisher: Baghdad University جامعة بغداد

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Abstract

There are different types of young isolated NSs: radio pulsars, compact central X-ray sources in supernova, magentas: anomalous x-ray pulsars (AXPs) and soft gamma-ray repeaters (SGRs).This paper shows that the value of magnetic field (B), characteristic age (T_ch), spin down luminosity (L_sp), equilibrium period (P_eq) and Flux density (S_mjy) was determined depending on some properties of pulsar star, such as the value of period of the pulsar (P) and the time derivative period (P^•) for sample stars which were adopted. The model that which adopted is Hallo Cone Model. The results showed that the Normal pulsar stars have a big magnetic field, equilibrium period and Spin down than the Millisecond pulsar stars.But Millisecond pulsar stars have large values of Luminosity and Flux density than Normal pulsar star that mean Normal pulsar star is lose its energy in long time that mean its younger than Millisecond Pulsar star.

هنالك انواع مختلفة من النجوم النوترونية المعزولة مثل النجوم الراديوية النابضة ونجوم مركزية من نجوم الاشعة السينية في مركز السوبر نوفا ونجوم الاشعة السينية الراديوية النابضة ونجوم اشعة كاما النابضة . في هذا البحث قيمة المجال مغناطبسي والعمر المميز وتباطؤء اللمعانية ومدة التوازن بالاضاقة الى كثافة الفيض تم تعيينها بالاعتماد على بعض الخواص لنجوم النابضات مثل الفترة للنجم النابض ومشتقة الفترة لعينة من النجوم تم اعتمادها .النموذج الذي تم الاعتماد عليه بالدراسة هو نموذج الاسطوانة الضوئبة .بينت النتائج ان النجوم الاعتيادية الفترة تملك مجالا مغناطسي اكبر وفترة توازن وكذلك اكثر تباطؤ من النجوم الملي ثانية النابضة لكن نجوم الملي ثانية لها لمعانية اكثر وكتافة فيض اكبر اي ان النجوم الاعتيادية الفترة تفقد طاقتها بزمن اطول اي انها نجوم حديثة التكوين.

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