The evacuated tube solar collector ETC is studied intensively and extensively by experimental and
theoretical works, in order to investigate its performance and enhancement of heat transfer, for Baghdad climate
from April 2011 till the end of March 2012. Experimental work is carried out on a well instrumented collector
consists of 16 evacuated tubes of aspect ratio 38.6 and thermally insulated tank of volume 112L. The relation
between convective heat transfer and natural circulation inside the tube is estimated, collector efficiency, effect of
tube tilt angles, incidence angle modifier, The solar heating system is investigated under different loads pattern (i.e
closed and open flow) to evaluate the heat loss coefficient

هدفت الدراسة إلى إعداد منهج تدريبي بأسلوب البلايومترك ومعرفة تأثيره في تطوير القدرة الانفجارية ومستوى التحفيز العصبي الحركي ومساحة الوحدة الحركية العاملة لعضلات الطرف السفلي لدى لاعبي الكرة الطائرة، وافترض الباحثان وجود فروق ذات دلالة إحصائية بين نتائج الاختبارين القبلي والبعدي للمجموعتين الضابطة والتجريبية، والى وجود فروق ذات دلالة إحصائية بين المجموعتين الضابطة والتجريبية في الاختبار البعدي في الم

 . اهتمت دول العالم بالعملية التربوية لأهميتها في حركة المجتمعات . وبالتالي تفجير الطاقات الكامنة وتطوير القدرات الإبداعية للأفراد ومنهم تدريسي الجامعة كونهم الركيزة في عملية التعلم وعبر تأثير سماتهم الشخصية وتكمن مشكلة البحث في تشخيص نقاط القوة والضعف في شخصية تدريسي بعض كليات جامعة بغداد في ضوء استخدام أحدث مقاييس الشخصية وهدفت الدراسة الى التعرف على الفروق بين السمات لدى بعض تدريسي كليات جامعة ، أما

Abstract 

Locally natural occurring Iraqi rocks of Bauxite and Porcelanite (after pre calcinations at 1000^oC for 1hr) were used, with the addition of different proportions of MgO and Al₂O₃, to prepare refractory materials. The effects of these additives on the physical and thermal properties of the prepared refractories were investigated.

Many batches of Bauxite/MgO, Bauxite/Al₂O₃, Bauxite/MgO/Al₂O₃, and   Porcelanite/ MgO/Al₂O₃ were prepared. The mixture is milled and classified into different size fractions; fine (less than 45μm) 40%, middle (45-75μm) 40%, and coarse (75-106μm) 20% .

في ظل النقص في الساعات المخصصة لتدريس الأسس النظرية وقوانين الألعاب، ولاسيما لعبة الجمناستك،إذ إن الطالب لا يأخذ كفايته من التحصيل في الأسس النظرية وقانون اللعبة. يرمي البحث إلى تصميم خرائط ذهنية لبعض المفردات النظرية للتحصيل المعرفي بلعبة الجمناستك، والتعرف على تأثير استخدام الخرائط الذهنية في التحصيل المعرفي، وافترضت الباحثة وجود فروق ذات دلالة إحصائية بين نتائج اختباري التحصيل والاحتفاظ. ووجود فروق

تعد خرائط المفاهيم أداة تمكننا من تنظيم المفاهيم على صورة نسق هرمي تتدرج فيه المفاهيم حسب درجة تجريدها من الأكثر تجريدا إلى المفاهيم الآفل تجريداً وبالتالي تبرز فيها العلاقات بين المفاهيم ويزداد الارتباط والمعنى فيما بينها.أما مشكلة البحث من خلال عمل الباحث كمساعد مدرب لمنتخب الكرة الطائرة في مديرية الرصافة الثانية فقد لاحظ وجود ضعفً واضحً في ما يتعلق بفهم وتطبيق مهارات لعبة الكرة الطائرة وعدم معرفتهم بق

Fiber Bragg Grating has many advantages where it can be used as a temperature sensor, pressure sensor or even as a refractive index sensor. Designing each of this fiber Bragg grating sensors should include some requirements. Fiber Bragg grating refractive index sensor is a very important application. In order to increase the sensing ability of fiber Bragg gratings, many methods were followed. In our proposed work, the fiber Bragg grating was written in a D-shaped optical fiber by using a phase mask method with KrFexcimer. The resultant fiber Bragg grating has a high reflectivity 99.99% with a Bragg wavelength of 1551.2 nm as a best result obtained from a phase mask with a grating period of 1057 nm. In this work it was found that the rota

Psychological studies expanded very much, but the researchers forgot very important subjects such as Political participant, and they put their efforts in reading resources to try insuring its results, or to applying it in logic environment and its different Cultures from our Culture in its Values, Criterion, and Attitudes that use their results more difficult. Despite of research movement expansion, but critic was still especially in Political Psychology field, and may be took thritically from researches, and they remote from it practically, and this study a sereace try to put a practical principle that our society need it especially which we practice the Political participant every four years, and we practice it in our departmen

The removal of direct blue 71 dye from a prepared wastewater was studied employing batch electrocoagulation (EC) cell. The electrodes of aluminum were used. The influence of process variables which include initial pH (2.0-12.0), wastewater conductivity (0.8 -12.57) mS/cm , initial dye concentration (30 -210) mg/L, electrolysis time  (3-12) min, current density (10-50) mA/cm2   were studied in order to maximize the color removal from wastewater. Experimental results showed that the color removal yield increases with increasing pH until pH 6.0 after that it decreased with increasing pH. The color removal increased with increasing current density, wastewater conductivity, electrolysis time, and decreased with increasing the concen

The traction property is one of the important mechanical properties, especially the rotary parts which are subjected to constant and variable loads There are many methods used to improve this property, and the shoot peening by metal balls is considered the most critical one. the study focuses on this characteristic of steel CK35 used in many engineering applications as the rotating shafts and railway This study shows that the fatigue strength is improved by14% after shoot peening with metal balls. The study includs the rehabilitation of damaged samples as a result of fatigue corrosion. The standard solution adopted was 36% MgCl­₂ with a 30 days immersion period. These samples has been improved by 6% after it decreased by18% d

This investigation presents an extensive experimental study on the behaviour and strength of reinforced concrete T-beams before and after strengthening by using reinforced concrete jacket. Four full scale beams were first loaded to certain levels of ultimate capacity (0, 60%, 77%, 100% of failure load). Then, after formation of cracks or failure, they were repaired by reinforced concrete jacketing method and tested again up to failure. The main objective of this study is to restore the full ultimate capacity beams failed by flexure and to strengthen the cracked beam. Also, it is aimed to investigate the effect of loading condition on beam before repair on the ultimate capacity after repair. Extensive measurements of deformations, cr

Survival of E. coli (0114:K90) on each of glass, wood, polystyrene

The present study was conducted in two different farms, including (256) foaling mares in : AL-Laith equine herd and equestrian club in AL-Ameria, 4-14 years old foaling mares which are situated in areas around Baghdad and extended one calendar from July 2011 until July 2012 . These mares were examined for pregnancy diagnosis by trans-rectal ultrasonography using a 5 MHz lineararray transducer between Days 10 and 40 after breeding (breeding day = Day 0). Criteria to assess the accuracy of trans-rectal sonography were overall accuracy (correct diagnoses/all diagnoses), sensitivity (correct diagnoses "pregnant"/all pregnant animals), and specificity (correct diagnoses "non-pregnant" /all non-pregnant animals. The sensitivity, specificity an

Self-nanomicellizing solid dispersion is a new formulation that combines the advantages of solid dispersion and nanomicelles strategies to increase drug oral bioavailability. The strategy involves utilizing a suitable carrier to create a solid dispersion that self-assembles into nanomicelles when it comes into contact with gastrointestinal fluids. Rebaudioside A is a steviol glycoside that has been reported to possess nano carrier-like characteristics by being self-assembled into nanomicelles in aqueous solutions. Canagliflozin is a novel sodium-glucose cotransporter-2 inhibitor approved for treating patients with type 2 diabetes. Its oral administration is associated with variable and poor absorption, owing primarily to insolubility in

An updated checklist of the Megachilid bees of Iraq is presented in this paper. The current list includes 31 species belonging to 10 genera, under the tribes Lithurgini, Osmiini, Anthidiini, and Megachilini within the Megachilinae subfamily. The basionyms, synonyms, and distribution of species in the world are also given. Based on the specimens, which obtained during this study, a diagnostic key was designed to identify the tribes and genera; the genus Heriades Spinola, 1808 (Tribe, Osmiini) is recorded for the first time in the Iraqi entomofauna.

The purpose of this study is to investigate the biostimulation effect of 532 nm CW laser on the metabolism of Saccharomyces cerevisiae yeast. Cells were irradiated by 532 nm Nd:YAG laser using 0.153 W/cm2 power density at 30, 45, 60,180 and 300 seconds exposure times in their respective orders. Intrafluorescence parameters were measured by detection the autofluorescence intensity, proliferation rate and Imaging the fluorescent mitochondria using confocal laser scanning microscope. The results showed that the 30 and 45 second exposure times seem to have stimulated changes in the cells that led to increase proliferation, viability and mitochondrial activity. Autofluorescence of cells increased after 45 and 60 seconds exposure time. After 3

A characteristic study of a passively Q-switched diode pumped solid state laser system is presented in this work. For laser a comparison study for the theoretically calculated results with a simulation results using a software which calculates the Q-switched solid state laser parameters was such as energy, peak power and pulse width were performed. There was a good agreement between our theoretical calculations and the simulation values.

This paper deals with the nonlinear large-angle bending dynamic analysis of curved beams which investigated by modeling wave’s transmission along curved members. The approach depends on the wave propagation in one-dimensional structural element using the method of characteristics. The method of characteristics (MOC) is found to be a suitable method for idealizing the wave propagation inside structural systems. Timoshenko’s beam theory, which includes transverse shear deformation and rotary inertia effects, is adopted in the analysis. Only geometrical non-linearity is considered in this study and the material is assumed to be linearly elastic. Different boundary conditions and loading cases are examined.

From the results obtai

     The current study was designed to determine the infection rate of intestinal protozoa in sheep and their handlers, and in their drinking water, in Wasit province, so as to study the relationship between contamination of drinking water with protozoal pathogen and infection in sheep and handlers in the period from the beginning of September 2015 to the end of February 2016. Two hundred eighty fecal samples were collected: (180) samples from sheep and 100 samples from human (50 handlers and 50 from non handlers), 50 drinking water samples were collected (18 samples; human tap water and RO bottled water and 32 samples river water). All samples were examined by conventional methods (direct moist smears, flotation with

The purpose of this study was to evaluate the effect of formaldehyde on the kidney <

 هدفت الدراسة الى التعرف على تأثير برنامج تدريبي مقترح (بدني- نفسي) في بعض المتغيرات الفسيولوجية الكولسترول، ثلاثي الكليسيريد، البروتين عالي الكثافة (H.D.L)، البروتين منخفض الكثافة (L.D.L)، البروتين المنخفض الكثافة جداًV.L.D.L)) وموقع الضبط الخارجي وقد أُجري البحث على عينة اشتملت (5) لاعبين من منتخب العراق/بغداد فئة المتقدمين بلعبة تنس الطاولة وقد استغرق تطبيق البرنامج التدريبي مدة (10) أسابيع وبواقع (3) وحدات تدريبي

Experimental investigations had been done in this research to demonstrate the effect of carbon fiber and Ceramic fillers contents on the tribological behaviour of (15% volume fraction) carbon-epoxy composite system under varying volume fraction, load, time and sliding distance. The wear resistance were investigated according to ASTM G99-05standard using pin on disc machine to present the composite tribological behaviour. The influence of three ceramic fillers, granite, perlite and calcium carbonate (CaCO₃), on the wear of the carbon fabric reinforced epoxy composites under dry sliding conditions has been investigated. The effect of variants in volume fraction, applied load, time and sliding distance on the wear behaviour of po

A field experiment was carried out to study the role of humic acid in improving some growth characters of corn (Zea mays L.) under water stress conditions during fall of seasons 2016, 2017, by using randomized complete block  design within split plot arrangement and three replications. The study consisted of three levels of water stress, when depleting 50, 60 and 70% of available water which was equivalent to 580, 420 and 340 mm season^-1 respectively, and occupied the main plot, while the levels of humic acid 0, 40, 60 and 80 kg^-1 were in sub plots. The results showed no significant differences between the treatments of depletion 50% and 60% of the available water in number of days to tasseling

This research aims to study the economic evaluation of meat Broiler projects province of Diyala for 2017 by identifying the economic merit of the production projects of the meat broiler by applying some economic evaluation criteria using questionnaire form. Data were collected randomly from a sample of 40 meat Broiler breeders representing 20.41% of  total 196 poultry fields which established in Diyala Governorate. The sample was divided into three categories: the first category was 21 breeders, the second category was 15 breeders, the third category was 4 breeders, and the design capacity of each category (1-50) thousand Broiler, (51-100) thousand Broiler, more than 100 thousand Broiler respectively. The results showed that

The function of internal auditing has become an important function that aims at achieving objectives that are compatible with these developments and changes that have occurred in many countries in the world, which required the emergence of professional associations and institutes in the profession of internal auditing. Improve the guideline of the internal audit units issued by the Federal Audit Bureau to enhance the efficiency of internal audit performance in Iraqi government units. The researchers adopted the statistical method of proving the hypothesis by constructing a questionnaire that included three main axes: supporting the senior management in adopting the current guide, and the second being the importance of improving t

A field experiment was carried out in loam soil at the research station of the College of Agriculture University of Baghdad, using randomized complete block design. The experiment included three local biofertilizers types (Bacillus megaterium, Pseudomonas fluorescens, Azotobacter chrococcum) and an imported biofertilizer (Nitrosoil) by Iraqi’s Ministry of Agriculture, beside, two levels of mineral fertilization (50% and 75%) of the mineral fertilizer recommendation with use of two types of carriers (corn cobs residue, broth liquid medium) in addition to the control treatments. Three replicates for each treatment were used on growth and yield of potato

Cystinosis is a lysosomal storage disease characterized by an intracellular accumulation of cystine in different organs and tissues, leading to potentially severe organ dysfunction. The neurological manifestations in cystinosis are generally late and non-dominant. In this report, we described a case of infantile cystinosis with dominant neurological manifestations at the presentation. A three-and-a-half-year-old male baby was presented to the pediatric teaching hospital with a history of poor growth and delayed milestones. The condition started at the age of six months, with abnormal growth and development. Family history was positive for mental retardation. The child had a few dysmorphic features such as frontal bossing and wrist wideni

The Material Balance Equation is a crucial tool utilized in reservoir studies to evaluate fluids and rock properties at static pressures. The Flowing and Dynamic Material Balance methods offer a significant advantage by avoiding the requirement to shut down wells, as they use flowing pressure instead of static pressure under constant or variable flow rates. The concept of "Dynamic Material Balance" involves converting the bottom hole flowing pressure at any point at any given time to the average reservoir pressure at that point. This allows for the use of classical material balance calculations and the development of classical material balance plots. In this study, the Dynamic Material Balance and Agrawal Type Curve techniques were used

Background; paraphilias were studied in the sex
clinic, at Al-Rashad teaching mental hospital, in the
years 2009-2010, a subject never touched before in the
field of psychiatry in Iraq.
Aims of the study :
1-to identify the prevalence of types and number of
paraphilias in those patients.
2-to study the relationship of paraphilias with
sociodemographic factors of the patients.
Patients and methods; using the diagnostic criteria of
DSM IV TR, 52 patients from the outpatient sex clinic
at Al-Rashad mental hospital, collected and studied (41
males and 11 females).
Results; the ratio of men to women was 3.7 : 1, the
majority of our sample was in the age range of 21-30
years (36.35%), with a limited

Internet paths sharing the same congested link can be identified using several shared congestion detection techniques. The new detection technique which is proposed in this paper depends on the previous novel technique (delay correlation with wavelet denoising (DCW) with new denoising method called Discrete Multiwavelet Transform (DMWT) as signal denoising to separate between queuing delay caused by network congestion and delay caused by various other delay variations. The new detection technique provides faster convergence (3 to 5 seconds less than previous novel technique) while using fewer probe packets approximately half numbers than the previous novel technique, so it will reduce the overload on the network caused by probe packets.