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Article
PREDICTING MICROVASCULAR COMPLICATIONS IN DIABETIC PATIENTS

Author: Yousif AR Al Ani يوسف عبد الرحيم عبد الغفور العاني
Journal: IRAQI JOURNAL OF MEDICAL SCIENCES المجلة العراقية للعلوم الطبية ISSN: P16816579,E22244719 Year: 2011 Volume: 9 Issue: 3 Pages: 195-205
Publisher: Al-Nahrain University جامعة النهرين

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Abstract

BackgroundPatients with diabetes have an increased risk of developing microvascular complications, diabetic retinopathy, diabetic nephropathy and diabetic neuropathy, which if not predicted, early detected and treated, place a significant burden on individual’s health and can reduce life expectancy.ObjectiveTo determine the main risk factors (predictors) that associated with microvascular complications in diabetes aiming to construct a module that can detect microvascular complications depending on these predictors.MethodsA cross sectional descriptive study was carried out with 364 diabetic patients. Data about diabetes microvascular complications (retinopathy, clinical peripheral neuropathy, and nephropathy) and their potential risk factors were collected. Primary point was detecting the < 0.01 level of significant association of risk factors with these complications to determine the predictors. These predictors were assessed for each individual’s micro vascular complication and also as a composite outcome by logistic regression analysis.ResultOf the examined 364 diabetic cases, 174 (47.80%) patients were found with microvascular complications. Neuropathy, nephropathy, and retinopathy were detected in 66 (18.13%), 62 (17.03), and 46 (12.64%) patients, respectively. Out of 12 potential predictors, only six (age, smoking habit, duration of diabetes, uncontrolled hyperglycemia, hypertension, and macrovascular complications) found to be significantly associated with the presence of microvascular complication (p < 0.01) as compared with patients who had no such complications. Uncontrolled hyperglycemia was the first predictor in neuropathy and nephropathy groups, while diabetic duration was ranking first in retinopathy group.ConclusionsMicrovascular complications in diabetic patients can be predicted, and avoided, by detecting their risk factors. Logistic regression equation provide suitable module for evaluation of these risk factors simultaneously.Key wordsMicrovascular complications, diabetes, logistic regression


Article
Improving a Model for Speed / Density Relationship on Arterial Roads in Baghdad City

Author: Abeer Khudher Jameel
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2011 Volume: 29 Issue: 3 Pages: 625-638
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

This paper was undertaken to investigate the relationships between speedand density on urban arterial roads of Baghdad City. This research work was basedon the traffic survey data (PC volume and average speed) collected in PalestineStreet in 3 sections at two directions through 12 hours within 3 weekdays. Thedensity is computed using fundamental formula of traffic flow. Eight theoreticalSpeed-Density models (5 are single Regime Models and 3 are Multi-Regimemodels) are validated by the field data by two statistical test methods (CHISQ testand Paired T-test). The results show that no one of the theoretical models is goodin fit with the real data. Then a Multi-Regime Model is improved under two rangesof density (<70 and >70) at south approach and (<60 and >60) at north appraoch .This model is tested using regression analysis, CHISQ test, and Paired T-test. Thisanalysis shows that the model has good fit with the field data.


Article
Detecting Outliers In Multiple Linear Regression
اكتشاف القيم الشاذة في الانحدار الخطي المتعدد

Author: إيهاب عبد السلام محمود
Journal: journal of Economics And Administrative Sciences مجلة العلوم الاقتصادية والإدارية ISSN: 2227 703X / 2518 5764 Year: 2011 Volume: 17 Issue: 64 Pages: 9-41
Publisher: Baghdad University جامعة بغداد

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Abstract

Abstract :
It is well-known that the existence of outliers in the data will adversely affect the efficiency of estimation and results of the current study. In this paper four methods will be studied to detect outliers for the multiple linear regression model in two cases : first, in real data; and secondly, after adding the outliers to data and the attempt to detect it. The study is conducted for samples with different sizes, and uses three measures for comparing between these methods . These three measures are : the mask, dumping and standard error of the estimate.

من المعروف ان وجود القيم الشاذة في البيانات يؤثر سلبا على كفاءة التقديرات والنتائج للدراسة الموضوعة, وفي هذا البحث سيتم دراسة (4) طرائق لاكتشاف القيم الشاذة لنموذج الانحدار الخطي المتعدد ولحالتين: لبيانات حقيقية والحالة الثانية بعد اقحام قيم شاذة للبيانات ومحاولة كشفها، وقد تمت الدراسة باحجام عينات مختلفة واعتماد (3) مقاييس للمقارنة بين هذه الطرائق هي: القناع, الاغراق والخطأ المعياري للتقدير .


Article
ESTIMATION THE 7 AND 28- DAY NORMAL COMPRESSIVE STRENGTH BY ACCELERATED TEST METHODS IN CONCRETE
تخمين مقاومة الانضغاط الاعتيادية بعمر 7 و 28 يوم بأستخدام طرق الفحص المعجلة في الخرسانة

Authors: Firas F. Abdul-Hameed فراس فيصل عبد الحميد --- R.S. Al Rawi رياض شفيق الراوي --- Zena K. Abbas زينة خضير عباس
Journal: Journal of Engineering مجلة الهندسة ISSN: 17264073 25203339 Year: 2011 Volume: 17 Issue: 6 Pages: 1426-1443
Publisher: Baghdad University جامعة بغداد

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Abstract

Curing of concrete is the maintenance of a satisfactory moisture content and temperature for a period of time immediately following placing so the desired properties are developed. Accelerated curing is advantages where early strength gain in concrete is important. The expose of concrete specimens to the accelerated curing conditions which permit the specimens to develop a significant portion of their ultimate strength within a period of time (1-2 days), depends on the method of the curing cycle. Three accelerated curing test methods are adopted in this study. These are warm water, autogenous and proposed test methods. The results of this study has shown good correlation between the accelerated strength especially for the proposal curing test method and normal strength using normal curing method at ages 7 and 28 day for the five different chemical composition of cement with different water to cement ratios equal to 0.45, 0.55, 0.65 and 0.75. Linear and nonlinear regression analysis show high correlation for the different types of the accelerated curing methods with coefficient of correlation (R2) more than 0.9

معالجة الخرسانة هي من أجل المحافظة على كمية الماء المناسبة و درجة الحرارة لفترة من الزمن مباشرة بعد عملية الوضع من أجل تطوير الخصائص المطلوبة. المعالجة بالطريقة المعجلة هي مفيدة عندما يكون من المهم الحصول على القوة المبكرة. تم دراسة النماذج الخرسانية المعرضة الى المعالجة المعجلة من أجل الحصول على الجزء الاكبر من قوتها النهائية خلال فترة تتراوح بين يوم و يومين بالاعتماد على طريقة المعالجة. أعتمدت ثلاثة طرق في المعالجة المعجلة و هي طريقة الحمام الدافئ , طريقة التعجيل الذاتي و الطريقة المقترحة. أظهرت النتائج علاقة جيدة بين المقاومة المعجلة و خاصة الطريقة المقترحة مع 7 و 28 يوم للخرسانة المعجلة أعتياديا للخمس أنواع سمنت مختلفة التركيب الكيمياوي و لنسبة ماء الى سمنت تساوي 0.45, 0.55 , 0.65 و 0.75. الموديلات الاحصائية الخطية و غير الخطية أظهرت علاقة جيدة للطرق المختلفة للمعالجة المعجلة مع معامل أرتباط لا يقل عن 0.9.


Article
RELATONSHIPS BETWEEN GRAIN FILLING DURATION AND GRAIN YIELD IN SORGHUM Sorghum bicolor L. (Moench).
العلاقة بين فترة امتلاء الحبة وحاصل حبوب الذرة البيضاء Sorghum bicolor L. (Moench).

Author: Wisam Mallik Dawood وسام مالك داود
Journal: Diyala Journal of Agricultural Sciences مجلة ديالى للعلوم الزراعية ISSN: 20739524 Year: 2011 Volume: 3 Issue: 1 Pages: 60-66
Publisher: Diyala University جامعة ديالى

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Abstract

Five sorghum varieties (Milo, Kafir, Durado, Rabihe and Ingath),were grown in a field experiment at Al-Khalis station research . spring and autumn seasons of 2008 The aim of the study was to investigate the relationships between grain filling duration (GFD) and sorghum grain yield. This experiment was planted as a randomized complete block design(R.C.B.D.) with three replications. The results showed that significant positive correlations of (GFD) were found among (GFD) with days number to 50% anthesis ,number of days to physiological maturity and grain yield . Significant positive correlation was also noticed among days to 50% anthesis, days number to physiological maturity and grain yield. The linear regression coefficient between grain yield and days to 50% anthesis indicates an increase (22.392, 9.483 kg.ha-1) in grain yield for each additional day required for (GFD).

زرعت خمسة أصناف من الذرة البيضاء (Ingath, Rabihe, Durado, Kafir, Milo)، في تجربة حقلية بمحطة أبحاث الخالص خلال الموسمين الربيعي والخريفي 2008 م .وكان هدف البحث علاقة معرفة علاقة الارتباط بين فترة امتلاء الحبة وحاصل حبوب الذرة البيضاء. وطبقت هذه التجربة في تصميم القطاعات العشوائية الكاملة في ثلاثة مكررات. أظهرت النتائج وجود ارتباط معنوي موجب بين فترة امتلاء الحبة مع كل من عدد الأيام إلى التزهير ، وعددها إلى النضج الفسيولوجي ومع حاصل الحبوب. دل الانحدار الخطي بين حاصل الحبوب وعدد الأيام إلى التزهير على أن هنالك زيادة مقدارهــا (9.483, 22.392) كغم. هـ1- للموسمين الربيعي والخريفي على التوالي في حاصل الحبوب مع كل يوم إضافي لفترة امتلاء الحبة.

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