research centers


Search results: Found 356

Listing 1 - 10 of 356 << page
of 36
>>
Sort by

Article
Left Ventricular Function in Early Stages of Ischemia

Author: Nadiya Younis Mohammed
Journal: Iraqi Academic Scientific Journal المجلة العراقية للاختصاصات الطبية ISSN: 16088360 Year: 2008 Volume: 7 Issue: 1 Pages: 26-29
Publisher: The Iraqi Borad for Medical Specialization المجلس العراقي للاختصاصات الطبية

Loading...
Loading...
Abstract

ABSTRACT:BACKGROUND:Ischemic heart diseases are common diseases that influence the heart performance via the changesoccurring in cardiac muscles resulting from the disease. These changes can affect the left ventricular wall,septum thickness and an eventual effect on the cardiac performance.AIM OF THE STUDY:The merit of this work is to investigate the effects of left ventricular function on patients who suffer fromearly ischemic heart.METHODS:Twenty five patients complaining from chest pain and diagnosed as angina were subjected to ourinvestigation, they were free from other cardiac diseases and have no previous heart attack their averageage was (52.85±12.69 years old). Eighteen normal individuals (control) with average age (48.33±12.55years old) are chosen and are free from any disease. M-mode, 2- dimensional parasternal long axis viewwas used in the measurements of LV interdiameter, septum and posterior wall thicknesses. Dopplerechocardiography tracing of four chamber apical view was obtained to indicate the ejection time andmitral flow velocities at early diastole E and at atrial contraction (end of diastole) A.RESULTS:The effect of early IHD was found on the interventricular septum (decreased by 44.18%), posterior leftventricular wall (decreased by 47.62%), fractional shortening (decreased by 28.93%), and ejection fraction(decreased by 20.05%). There was no significant change observed on the A/E ratio but a significantchange was seen on E wave only.CONCLUSION:In early of IHD, ejection fraction and percentage changes of wall thickness indicate cardiac performance.In addition reduced early mitral flow velocity is more frequent than the change in early to late mitral flowvelocity ratio.


Article
Evaluation of the performance of private hospitals from the point of view of the beneficiaries (A field Study in the private Sector hospitals in Baghdad)

Author: باسل عباس حنفي
Journal: Iraqi National Journal of Nursing Specialties المجلة العراقية الوطنية للاختصاصات التمريضية ISSN: 18122388 Year: 2005 Volume: 18 Issue: 2 Pages: 1-10
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Abstract Objectives: This Paper is an attempt to evaluate the services provided by the private hospitals and to identify the strength and weakness in their performance The results can be utilized in stating conclusion and recommendations to improve and activate the role of private medical sector in society . Methodology: A questionnaire has be designed for this purpose and distributed to ( 132 ) beneficiaries mostly from Baghdad private hospitals . Results: The paper has come out with many important results . Among These are the following : * these who benefit from services provided by private hospitals believe that the good performance of such hospital is not due to the medical services alone but also to scientific aspects . * The results also show that the simple satisfaction factors on the lack of integrated services and not on the prices of such services . Key words : ( performance, evaluation, private hospitals )

الخلاصة الهدف: يهدف البحث تقويم اداء الخدمات التي تقدمها المستشفيات الاهلية وفحص عوامل القوة والصعف فيها والوصول الى نتائج وحقائق رقمية يمكن استثمارها في صياغة استنتاجات وتوصيات من شأنها تحديد العوامل والظروف التي يمكن من خلالها زيادة دور القطاع الطبي الخاص في تقديم الخدمات العلاجية للمواطنييـن . المنهجية: وتحقيقاً لذلك تم اعداد استمارة استبيانية تم توزيعها على عينة من المستفيدين من خدمات المستشفيات الاهلية شملت (132) فرداً وقد تم التركيز على مستشفيات بغداد لكونها تمثل (65%) من مجموع المستشفيات الاهلية العاملة في العراق وباستخدام الاساليب الرياضية والاحصائية تم استخلاص بعض النتائج التي من شأنها اختبار فرضيات البحث . النتائج وتوصل البحث الى ان المستفيدين من خدمات المستشفيات الاهلية يسودهم الاعتقاد بان عوامل تفوق اداء هذه المسشفيات لايعود الى الخدمات الصحية الفندقية فحسب بل الى الجوانب العلمية ايضاً كما اظهرت النتائج بان عوامل الرضا البسيط تتركز في عدم تكامل خدمات المستشفيات الاهلية ولم تشكل الاسعار التي يتم استيفائها من ضمن عوامل عدم الرضا . المفتاح : ادارة المستشفيات


Article
Load Effect on Wall Attachment Fluidics Amplifier Performance

Author: Ali Abdalmohsin AL-Asadi
Journal: Iraqi Journal of Chemical and Petroleum Engineering المجلة العراقية للهندسة الكيمياوية وهندسة النفط ISSN: 19974884/E26180707 Year: 2016 Volume: 17 Issue: 1 Pages: 13-19
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

An experimental work has been conducted on wall attachment fluidics amplifiers, one of them to study the effect of output pressure or load on the amplifier performance. The output load has been simulated as a piston connected to the device output and the piston can be loaded accordingly. The results shows that the output volume flow rate increases as the supply pressure increases under different load and the output pressure remains constant as the supply pressure increases under constant load.


Article
Study the effect of number of parturitions on the measurements of reproductive performance of dairy cows

Authors: Mohammad Y. Mahmood --- Noorulden Y. Khudhair --- Yaseen M. Rasheed
Journal: Kufa Journal For Veterinary Medical Sciences مجلة الكوفة للعلوم الطبية البيطرية ISSN: 20779798 Year: 2014 Volume: 5 Issue: 2 Pages: 223-229
Publisher: University of Kufa جامعة الكوفة

Loading...
Loading...
Abstract

This study is conducted in Latifiya station for dairy cows in south east of Baghdad. Which have Holstein and Friesian and cross breed among them, from the first of April 2012 until the first of August 2014. Dystocia rate 69.81% recorded and also 26.8% retained placenta with 16% ovarian problem and 53% uterine problems for (386) cows.The cows of research are divided into four group according the number of parturition and four reproduction performance parameters are used.(calving interval) ,(open day) ,(conception from first service) and finally (services per conception).The results are in the first group (2parturitions) (121) cows were 423.7 day for calving interval ,107.1 days open ,27.4% conception from first service and 2.3 services per conception ,the result of second group (3parturitions) (106)cows were ,458.3 day calving interval ,188.1 day open days, 25.3% conception from first service and 2.28 services per conception that statically significant. The result of third group (4 parturition ) (120)cow record 427.6 days calving interval ,156.2 days open ,37% conception from first service ,and2.15 services per conception. with statistical significant difference at p< 0.01. The last group (5 parturitions) (58) cow also record 378.8 days calving interval ,101.8 days open ,49% conception from first services and 1.76 services per conception .The results of last two groups have statically significant at p<0.01 from first and second groups.


Article
LABORATORY EVALUATION OF MOISTURE DAMAGE AND DURABILITY OF HOT MIX ASPHALT (HMA)
تقييم مختبري لأضرار الرطوبة و الديمومة للخلطة الاسفلتية (HMA)

Authors: Doaa M. Azeez --- Yasir M. AL-Badran --- Namir G. Ahmed
Journal: Journal of Engineering and Sustainable Development مجلة الهندسة والتنمية المستدامة ISSN: 25200917 Year: 2017 Volume: 21 Issue: 2 Pages: 149-162
Publisher: Al-Mustansyriah University الجامعة المستنصرية

Loading...
Loading...
Abstract

The increasing of road material demand particularly on mineral filler and additives has been followed-up by finding the new alternative materials. Local materials such as Portland cement, and lime may potentially use to substitute current need. Therefore, it is essential to study the performance and durability of these materials in HMA mixture. To find the durability index, the specimens are immersed around 0 (unconditioned) to 14 days at 60ºC and tested by using Marshall and ITS tests. Based on Marshall test, the index values for mixes variations; DCF, DPC, DL, DPF, and DC are found to be; 42.965%, 36.59%, 36.582%, 35.68%, and 33.42% respectively.

أن زيادة الطلب على مواد انشاء الطرق و بصورة خاصة لانواع المادة المالئة المستخدمة في الخلطة الاسفلتية و كذلك المضافات دفع لأيجاد مواد بديلة. ان المواد المتوفرة محليا كالأسمنت البورتلاندي و الجبس يمكن ان تكون بديلا للحاجة الحالية. لذلك، فمن الضروري دراسة أداء وديمومة هذه المواد في الخلطة الاسفلتية. للحصول على مؤشر قوة التحمل، العينات تم غمرها لمدة 0 (غير معرض للغمر) الى مدة 14 يوما في درجة حرارة 60ºC و فحصها باستخدام طريقة مارشال. قيم المؤشر للخلطات المختلفة التي تم استخدامها هي DCF, DPC, DL, DPF, DC هي 42.965%, 36.59%, 36.582%, 35.68%, and 33.42% تباعا.

Keywords

Durability --- Cement --- Lime --- performance.


Article
THE EFFECT OF METHANOL BLENDED WITH GASOLINE ON THE PERFORMANCE AND VIBRATION OF SPARK IGNITION ENGINE
تأثير خلط الميثانول مع وقود البنزين على أداء واهتزازات محرك الاشتعال بالشرارة

Authors: Fadhel Abbass Abdulah --- Fouad Alwan Saleh --- Hajir Haitham Labeeb
Journal: Journal of Engineering and Sustainable Development مجلة الهندسة والتنمية المستدامة ISSN: 25200917 Year: 2017 Volume: 21 Issue: 4 Pages: 147-160
Publisher: Al-Mustansyriah University الجامعة المستنصرية

Loading...
Loading...
Abstract

This study is an experimental investigation of the effects of methanol addition to gasoline on the performance (brake power, brake specific fuel consumption), and emissions (carbon monoxide CO, hydrocarbons HC) of a spark ignition engine, engine vibration was also measured (Acceleration). The tests were carried out at constant throttle variable speed condition operating with standard and advanced spark timing (10˚ and 11˚ BTDC respectively) over the range of speed from 1500 to 2250 rpm and compression ratios CR=8 and 9 using various blends of methanol/gasoline 0% (M0), 5% (M5), 10% (M10), 15% (M15) and 20% (M20) methanol by volume. The experimental results showed that for standard spark timing, maximum power was obtained at M10 CR9 by increase of (18.29%) from M0. While for advanced spark timing, maximum power was obtained at M20 CR9 by an increase (18.27%) from M0. Advancing spark timing resulted in power increase by (13.4%) from standard spark timing. Optimum compression ratio for gasoline fuel was 8 while for methanol-gasoline blends was 9. Emissions of CO and HC were decreased significantly by using methanol as fuel additive and increasing methanol content in the fuel. M0 exhibited the lowest and most stable acceleration level at higher engine speed at CR8 (2000-2250 rpm). While for CR9, M5 generally showed the lowest acceleration values for lower and higher engine speeds. M15 fuel blend, showed maximum acceleration level compared to other fuel blends.

: الدراسة الحالية هي دراسة عملية لتأثير اضافة (كحول الميثانول الى وقود البنزين) على اداء المحرك (القدرة المكبحية، صرف الوقود)، والانبعاثات (احادي اوكسيد الكربون، دقائق الهيدروكربون) لمحرك الاشتعال بالشرارة وتم كذلك قياس الاهتزازات (التعجيل). تم اجراء التجارب العملية على محرك احادي الاسطوانة، رباعي الاشواط متغير نسبة الانضغاط موديل. ان الهدف الاساسي هو اختبار المحرك بنسب انضغاط متغيرة وتقديم توقيت الشرارة لإيجاد الاداء الامثل للمحرك بعد استخدام وقود جديد يتكون من الميثانول والبنزين. تم اجراء الاختبارات لمدى سرعة من 1500-2250 دورة/دقيقة بنسب انضغاط 8 و 9 باستخدام عدة خلطات وقود من الميثانول و البنزين (5%، 10%، 15% و 20%). عند توقيت الشرارة القياسي تم الحصول على اعلى قدرة عند M10 CR9 بزيادة (18.29%) بينما عند تقديم توقيت الشرارة تم الحصول على اعلى قدرة عند M20 CR9 بزيادة (18.27%) عن M0. ان تقديم توقيت الشرارة قد ادى الى زيادة قدرة المحرك بنسبة (13.4%) عن توقيت الشرارة القياسي. ان نسبة الانضغاط المثلى للبنزين هي 8 بينما خليط الميثانول- البنزين هي 9. ان انبعاثات CO وHC قد انخفضت بصورة كبيرة بإضافة الميثانول الى البنزين وزيادة نسبته. ان M0 اظهر ادنى مستوى اهتزازات واكثر استقرار عند السرع العالية عند CR8. بينما عند CR9 فإنه بصورة عامة M5 اظهر ادنى مستوى اهتزازات عند سرع المحرك العالية والواطئة. اما M15 فقد اظهر اعلى نسبة اهتزازات مقارنة بخلطات الوقود الاخرى.


Article
Factors Affecting on the Performance of Contractors in Constriction Project: Bagdad, Iraq

Authors: Raid Abidali --- Yerevan Ali
Journal: Journal of University of Babylon مجلة جامعة بابل ISSN: 19920652 23128135 Year: 2018 Volume: 26 Issue: 6 Pages: 257-265
Publisher: Babylon University جامعة بابل

Loading...
Loading...
Abstract

This paper investigated contractor's performance in Iraq. Determination and ranking the factors that affecting on the contractors' performance in construction projects are done. A field survey of 45 Iraqi contractors work in construction contracting companies (general and private sector) was under taken using structured questionnaires. The most effective factors on the contractor's performance were obtained using Relative Importance Index (RII). The work revealed that: cash flow of project, average delay in regular payments, contractor experience, design team experience, and site preparation time are the major factors influence on contractor’s performance in construction project.

حققت هذه الدراسة اداء المقاولين في العراق. تهدف هذة الدراسة الى تحديد وتصنيف العوامل المؤثرة على اداء المقاولين في المشاريع الانشائيه واجري المسح الميداني للمقاولين العراقين البالغ عددهم (خمسة واربعون مقاول)من الذين يعملون في شركات المقاولات الانشائية (في القطاعين الخاص والعام ) باستخدام الاستبيانات المنظمة ، وقد تم استخراج اهم العوامل المؤثرة على اداء المقاولين باستخدام مؤشر الاهمية النسبية(RII) حيث كشفت الدراسة ان التدفقات النقدية للمشروع ومعدل التاخير في الدفعات المنتظمة وخبرات المقاولين وخبرات فريق التصميم ومده تحضير الموقع هي العوامل الرئيسية التي تؤثر على اداء المقاولين في المشاريع الانشائية.


Article
Performance of computed tomography indiagnosis and evaluation oftraumatic intracerebral hemorrhage

Author: Haider Q. Hamood حيدر حمود
Journal: Journal of the Faculty of Medicine مجلة كلية الطب ISSN: PISSN: 00419419 / EISSN: 24108057 Year: 2011 Volume: 53 Issue: 2 Pages: 156-159
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Background:The intracerebral hemorrhage (ICH) can be classified as traumatic and spontaneous. The frontal and temporal lobes are classic sites for traumatic ICH, which are less commonly affected by spontaneous episodes. Computed tomography (CT) scanning is the most accurate radiological method for demonstrating the acute lesion of intracerebral hemorrhage (ICH). Both types are of high density, but traumatic bleeding is more frequently multifocal, in this study we are dealing with traumatic type of intracerebralhematoma. Aim of the study is to identify the accuracy and performance of CT scan in diagnosis and evaluation of intracerebralhemorrhage.
Patients and methods: 60 patients were examined, their agesrange from 30-70 years with means age 48 years old, they were 36males (60%), and 24females (40%).
Results: Our study reveals, the male patients (36 patients) were more affected than femalepatients (24 patients). Most affected age group in our study was 60-70 years old, 18 patients (30%) with no gender difference. Acute ICH was more than other ICH types, patients with acute ICH were 24 patients (40%) 15 male patients and 9 female patients, patients with subacute ICH were 20 patients (33%) and patients with chronic ICH were 16 patients (27%). In our study, the RTA was the most causative mechanism of ICH, 27 patients with RTA were seen in our study (45%), followed by shell injury which were 24 patients (40%) and then the fall from hight (FFH)which were 9 patients (15%). The most common CT feature noted in our study is the brain edema and it is seen in 27 patients (45%). Basal ganglia were most affected brain region (45%) of cases.
Conclusion:CT is available,rapid imaging modality in the diagnosis of ICH, so it is suitable for diagnosis and evaluation of ICH as emergency cases in casualty department and it is valuable in evaluation of traumatic I.C.H. especially in acute stages.


Article
Characteristic Performance of Deionized Columns

Authors: Mudhafar Y. Hussein --- Nahidh W. Kasser --- Matheel D. Al-Sabti
Journal: Iraqi Journal of Chemical and Petroleum Engineering المجلة العراقية للهندسة الكيمياوية وهندسة النفط ISSN: 19974884/E26180707 Year: 2008 Volume: 9 Issue: 1 Pages: 35-43
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

The reclamation of makeup water is studied in terms of breakthrough time (i.e., the leakage of the cations). Makeup water was subjected to lab-scale ion exchangers of two types: strong acid cation and weak base anion exchanger. The experimental investigation was directed to study the ion exchanger performance in terms of four different parameters (i.e., copper concentration, total dissolved solids (TDS), feed rate and bed depth). Box-Wilson composite rotatable design was adopted in designing the experiments. Breakthrough times of the effluent stream are measured in terms of copper concentration of 2 to 25 ppm, TDS concentration of 250 to 1250 ppm, feed rate of 0.38 to 5.34 l/h and bed depth of 5 to 70 cm. Simulation the effect of the studied variables through their pre-designed ranges in terms of breakthrough time was done by 2nd order polynomial equation. In general, the performance and characteristic of adopting two bed deionizers (cation and anion beds) was efficiently recommended to remove the ionic contaminants and not less than 95 % of wastewater is recycled.


Article
Modeling and Performance of a Wind Turbine
نمذجة واداء توربين ريحي

Author: Wissam Hashim Khalil وسام هاشم خليل
Journal: Anbar Journal of Engineering Sciences مجلة الأنبار للعلوم الهندسية ISSN: 19979428 Year: 2007 Volume: 1 Issue: 1 Pages: 116-130
Publisher: University of Anbar جامعة الانبار

Loading...
Loading...
Abstract

The dynamics of wind turbine has to be studied carefully to avoid unpredictable outputs and to make sure that consistent and efficient power is supplied according to the load requirements. There is a great and urgent necessity to increase the efforts in the development of the researches of the renewable energy to decrease the dependency on the conventional ones. The objective of this research is to make a contribution to the ongoing wind turbine research in the area of modeling, which is the first step required for the control and implementation of wind turbines. The wind turbine transfer function is derived and its performance has been established using the MATHLAB Software. This research provided a different approach to wind turbine modeling methodology. The results of this research may be used in another step for completing the control process of the wind turbine.

من الضروري أن يتم العناية بدراسة ديناميكية التوربينات الريحية لتجنب النواتج (المخرجات) غير المتوقعة ولضمان توافق وكفاءة القدرة المجهزة وفقاً لمتطلبات الحمل. هناك حاجة كبيرة وملحة لزيادة الجهود المبذولة لتطوير البحوث في مجال الطاقة المتجددة وذلك لتقليل الاعتماد على الطاقات التقليدية. الغرض من البحث هو وضع اسهامة في تطوير بحوث التوربينات الريحية في مجال النمذجة (modeling) والتي تعتبر الخطوة الأساسية الأولى اللازمة للسيطرة على عمل التوربينات الريحية. تم اشتقاق دالة الانتقال (transfer function) للتوربين الريحي وتم حساب أدائه باستخدام (MATHLAB). يعطي هذا البحث مفهوم مختلف لطريقة نمذجة التوربين الريحي، النتائج التي تم الحصول عليها في هذا البحث يمكن استخدامها في الخطوة التالية لإكمال السيطرة على أداء التوربين الريحي.

Keywords

Wind Turbine --- Modeling --- Performance --- MATHLAB

Listing 1 - 10 of 356 << page
of 36
>>
Sort by
Narrow your search

Resource type

article (356)


Language

English (356)


Year
From To Submit

2020 (9)

2019 (47)

2018 (53)

2017 (55)

2016 (33)

More...