Baghdad Science Journal
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The susceptibility test of vaginal yeasts and their relationship with the age in Iraqi women
Full text linkThis study aims to isolate the pathogenic yeasts from genital tract and investigate their relationship with the age .The results clarified that the most pathogenic yeast isolated from genital tract was Candida albicans , also the results of C.albicanas isolates susceptibility test, to different antifungal revealed that they were sensitive to Miconazole, Ketoconazole and Clotrimazol and were resistant to Nystatin and Grisofulvin. The study of relationship of vaginal infection with the age showed that the incidence of infection with Candida was high among females age group (19-39 years)
A study of some Biological Aspects of Procellio scaber(Isopoda : porcellionidae) Latrellile 1804In Al-jadriyia region /Baghdad-Iraq
No full textA study of some biological aspects of the crustacean Isopod procellio scaber was carried out for the period April 2003 to march 2004 . The study consisted reproductive and morphological characteristies such as size , weight and length of the body . The result showed that the highest population density of P. scaber was 1120 individual/m2 in September 2003 and less density 403 ind/m2 in February 2004. The density was generally high in Spring and Autumn, low in Summer and Winter months.An increase of the sexual ratio appear in the females number compared to males number (p < 0.05) during most of year. Present study showed non significant increase in the length and dry weight for females compared to males in most of year months. There were two seasons for reproduction, first starts in February to the ends of August, the second season starts in September,to the end in January. A number of Juveniles recorded during most time of year. While the percentage decreased during the Winter months and nearly disappeared during December. The large size individuals dominated during the Spring season which may be due to their rapid growth. The results showed that the moult individuals in different sizes class present for most year months, in large numbers small sizes class include due to their rapid growth. Life cycle data showed four biological stages: eggs, Manca, Juvenile and Mature stages. The female put between (2-70) eggs per each breed. There is one or tow breed for female in year
Stability of Nonlinear Systems of Fractional Order Differential Equations
No full textIn this paper, a sufficient condition for stability of a system of nonlinear multi-fractional order differential equations on a finite time interval with an illustrative example, has been presented to demonstrate our result. Also, an idea to extend our result on such system on an infinite time interval is suggested
Laser Effect on Fatique Resistance of Carbon Steel
No full textLaser beam has been widely used to improve the mechanical properties of the metals. It used for cutting, drilling, hardening, welding……etc. The use of Laser beam has many features in accuracy and speeding in work, also in the treatment of metals locally, and in the places that is hard to reach by traditional ways.
In this research a surface treatment was done to medium carbon steel (0.4%C) which is common kind of steel that is used in industry. Pulsing Neodymium -YAG Laser has been used and 1.06 micrometer wave length and 5 msec and the distance is about 30 centimeter between the exit area of the Laser beam from the system and the piece that treated .
We are going to check the fatigue resistance for samples that is treated by Laser beam and Scanning Electron Microscope (SEM) and also we made check for the microstructure by using the light microscope and the SEM for the breaking samples.
The results of checking showed that there is an improvement in the fatigue resistance after the treatment by the Laser beam. The results of microscope checking showed that the beginning of the failure is from the surface area and there is more than one level of the break
Detection of Extraintestinal Pathogenic Escherichia coli among Normal Stool Flora of Young, Healthy, Unmarried Males & Females as Predisposing Factor to Extraintestinal Infections:A Comparison Study
Full text linkIn this study we surveyed the dominant normal stool flora of randomly selected healthy, young (18-23 years old), unmarried (doctrinal) Iraqi college students (males and females) for the carriage of extraintestinal pathogenic E. coli (ExPEC). ExPEC virulence was detected phenotypically by mannose resistant hemagglutination of human red blood cells (MRHA) and mannose sensitive (MS) agglutination of Bakers' yeast (Saccharomyces cerevisceae). From 88 college students, 264 E. coli isolates were obtained (3 isolates per person): 123 from 41 females and 141 from 47 males. Of these isolates, 56% (149/264) caused MS agglutination of yeast cells and 4.16% (11/264) showed MRHA. Eighty two percent (9/11) of the isolates with MRHA also caused MS agglutination of yeast cells. Statistically the difference is not significant (P < 0.05) among males and females regarding the MS agglutination of yeast cells: 59% (72/123) of females' isolates vs. 55% (77/141) of males' isolates. Conversely, the difference is clear regarding the carriage of isolates with MRHA. All the isolates with MRHA were distributed among females' dominant stool flora (11/123: 8.94%) whereas none of the males' dominant stool flora showed MRHA (0/141: 0%). Five females out of 41 (12.19%) had isolates with MRHA. All the three isolates in 2 of these 5 females showed MRHA, 2 isolates in another 2 showed MRHA, and only one isolate in 1 female caused MRHA. Therefore we can say that the difference among males and females in fecal carriage of E. coli ,with characteristics of ExPEC, can be a predisposing factor of females to ExPEC infections more than males
Determination of Desferrioxamine in the Drug Desferal™ as DFOM-Au (III) Complex by Using Indirect Electrothermal Atomic Absorption Spectrometry and Other Techniques.
Full text linkاستحدث طريقة تحليلية غير مباشرة لتعيين المادة الفعالة الدسفيروكسامين في دواء الدسفرال من خلال تفاعل هذا المركب مع عنصر الذهب الثلاثي لتكون معقد مخلبي يجري استخلاصه بمذيب رابع كلوريد الكربون وحقن حجم معيين من هذا المستخلص في الفرن الغرافيتي المطلي بكربيد الزركونيوم . جرى دراسة معرفة تكوين وتركيب المعقد DFOM-Au(III)) بالتقنيات المعروفة مثل مطيافية الاشعة تحت الحمراء ومطيافية الاشعة الفوبنفسجية-المرئية وتبين ان النسبة المولية للعضيدة-الفلز هي 1:1.
لقد تم دراسة العوامل التجربية التي تؤثر على تكوين هذا المعقد من خلال حساب الممتصية الذرية بالفرن الكرافيتي للحصول على الظروف الامثلية . كما تم تثبيت ارقام الاستحقاق التحليلية (figures of merits ) من منحنيات المعايرة كالمدى الخطي والحساسية وحد الكشف ونسبة الاسترداد بالمائة والدقة المعبر عنها بالاستنساخيه . جرى تطبيق هذه الطريقة لتعيين الدسفيروكسامين في دواء الدسفرال ووجد ان تركيزه هو 488 و 484 ملغم / وحدة في هذا الدواء باستعمال المعايرة المباشرة واضافات القياس على التوالي مقارنة بالكمية المصرحة على العبوة وهي 500 ملغم / وحدة .
كانت نتائج مطيافية الامتصاص الذري غير المباشرة ومطيافية الاشعة الفوق البنفسجية-المرئية المباشرة متفقة إذ نفذت معظم الحسابات الاحصائية باستخدام البرنامج الحاسوبي (Minitab version 11) .An indirect method using electrothermal atomic absorption spectrometry (ETAAS) has been established for the determination of DFOM in the drug desferal™as DFOM-Au (III) complex. The formation of this complex at 1:1 mole ratio computed by UV-Vis spectrophotometric technique was confirmed by distinction of the IR absorption spectra between the free DFOM and its complex. Several experimental factors that effect the formation of DFOM-Au (III) complex were optimized using AA responses. Aliquots of the complex extract were injected into a coated GF and the AA-signals measured. A direct calibration graph was constructed and from which the figures of merits were found such as: LDR (0.08-3.5 µg ml-1), m0º (293.3 pg), LOD (0.0154 µg ml-1), RSD% (2.0-3.5), recovery present (101.54±0.86), and %Erel (1.54). The established indirect ETAAS was applied to analyze the drug desferal™ for the determination of DFOM using direct and standard additions procedures and DFOM found to be 488 and 484 mg/unit respectively compared to the stated value of 500 mg/unit. All statistical calculations were implemented via the chemsoftware (Minitab version 11)
Speaker Authentication Using Vector Quantization
Full text linkفي هذا البحث تم دراسة دور التكميم الاتجاهي في نظام التحقق من هوية المتكلم .تم دراسة التكميم الاتجاهي للتحقق من هوية المتكلم في طورين التجريبي والاختباري ,اهتم طور التجريب بتجميع موديلات المتكلم لبناء كتاب التشفيرالذي تم توليده من عدد من خواص المتجهات العائدة لكل نموذج من صوت المتكلم. اما طور الاختبار فيتضمن مطابقة المتكلم الغير معروف مع الموديلات.لقد انجزت عملية المطابقة من خلال تقييم مقياس التشابه بين نموذج المتكلم الغير معروف والموديلات في قاعدة بيانات المتكلم للتحقق منه.لقد تم استخدم مقياس وزن التشابه والذي ياخذ في نظرالاعتبار التطابق بين الموديلات الغير المعروفة في قاعدة البيانات حيث خصصت اوزان كبيرة للمتجهات التي لها قدرة تمييز عالية بين المتكلمين وبالعكس. اعطى النظام المقترح نتائج مشجعة حيث كان معدل التحقق حوالي 86% خلال زمن 4 ثواني.In this paper, the role of the vector quantization in the speaker authentication system was studied. Vector quantization based speaker authentication system was considered in two phases; training and testing. The training phase concerned with enrolling the speaker models to build the codebook. The codebook generated from a set of feature vectors belong to each sample of speaker's voice. The testing phase includes matching the unknown input speaker with the models. The matching is performed by evaluating the similarity measure between the unknown speech sample and the models in the speaker database to authenticate the input speaker. A weighted similarity measure was introduced; it takes into regard the correlations between the known models in the database. Larger weights are assigned to vectors that have high discriminating power between the speakers and vice versa. The proposed system gave an encourage results; the authentication rate was about 86.6% during a time 4 s
Improvement the bearing capacity of the soil which is supporting the shallow foundation by using bored short micro-piles
No full textفي هذا البحث تم استخدام الركائز الكونكريتية القصيرة (concrete micro-piles)لتحسين قابلية تحمل التربة الساندة للأسس الضحلة عن طريق استخدام مجموعة متكونة من (9,6,4) ركائز حفر ذات نوعين من الأقطار (0.125,0.1)m واستخدام نسبة الطول إلى القطرL/D (12,10,6 )على التوالي.
لحساب قابلية تحمل الركائز القصيرة تم استخدام طريقة (Tomlinson)و طريقة(Lamda) وقد استخدمت خواص التربة الموجودة في منطقة مطار المثنى (سابقا") لغرض أستحصال النتائج(Al-Qyssi, 2001)[1]
أظهرت النتائج أنه بزيادة عدد الركائز وِ / أو زيادة أقطارها وأطوالها وتداخل تأثير تحمل الأساس الضحل مع تحمل مجموعة الركائز تؤدي الى زيادة في مقاومة الأحمال الخارجية. وأفضل النتائج كانت عندما بلغ عدد الركائز (9) ونسبةL/D مساوي الى (12) حيث وجد أن نسبة التحسن في قابلية التحمل بلغت 90%))مقارنة بتحمل أساس ضحل بأبعاد (1×1)m وبدون اضافات, ومن مقارنة النتائج ظهر أن طريقة (Tomlinson) يعطي قيم أقل من طريقة (Lamda) بمقدار ما بين 2-6)%) وأن استخدام الركائز القصيرة ذات القطر (0.125m) ونسبة الطول الى القطر (L/D=12) بعدد( 4) أفضل من استخدام الركائز ذات القطر (0.1m) بعدد( 9).In this paper , concrete micro-piles were used to improve the bearing capacity of the soil which is supporting the shallow foundation by using groups of (4; 6 and 9)bored short micro-piles which have, (D=0.125m and D=0.1m), and length to diameter ratio (L/D) equal to (6; 10 and 12) respectively.
To calculate the bearing capacity of the micro-piles,(Tomlinson) and (Lamda) methods were used; also the soil properties were taken from Al-Muthana airport,(Al-Qyssi,2001) [1].
The results show that; increasing the number of piles and/ or the diameters and lengths; and the interaction between the bearing capacity of the shallow foundation with the bearing capacity of the pile group which leads to increasing the strength against the external loads; and the maximum bearing capacity was, when 9 piles with (L/D=12) was used. The improving ratio in the bearing capacity was (90%) compared with the bearing capacity of a (1×1) m shallow foundation without any piles.
The results show that, the Tomlinson method of analysis produce lower results than the Lamda method by a ratio of (2-6) %. The results show also that the use of bored short micro-piles with (D=0.125m); (L/D=12) and number of 4-piles better than the (9) bored short micro-piles which have (D=0.1m)
Measuring the effect of cell mismatch on PSPICE module model output
Full text link يقدم هذا البحث طريقة نظرية لحساب عامل عدم التماثل (mismatch factor) باستخدام برنامج PSPICE . من خلال دراسة هذا العامل تمت ملاحظة تأثير عامل عدم التماثل في خواص اللوح الشمسي وكذلك قدرته. عمليا في هذه الدراسة تم استخدام موديل للوح يتكون من 36 خلية شمسية مربوطة على التوالي والمبني في برنامج PSPICEمن عمل سابق قامت به الباحثة. وبما ان تطبيقات اللوح الشمسي كافة تحتاج الى سلسلة من الالواح التي تربط على التوالي او التوازي لتحقيق التيار والفولتية المناسبة لذلك، تم فحص تأثير عدم التماثل في خلايا اللوح الشمسي عند ربطها على التوالي والتوازي ايضا. أثبتت الدراسة ان تأثير هذا العامل يختفي عند ربط الالواح على التوازي. This research presents a theoretical method to calculate the mismatch factor for the PV module. Within this study the effect of mismatch on I-V and P-V of the module is observed. In practice, the PV panel module consists of 36 cells connected in series part that is built into PSPICE (from previous work) is used for this study. The PV modules are wired in a long series string in most of PV applications; the performance will be disproportionately limited by any one module that is not producing as much power. Fortunately, by changing the system configuration it is possible to isolate losses so that entire arrays are not affected by poor performance in one module. So, in this work the mismatch effect has been tested for series and parallel wiring of the modules, the parallel configuration produced significantly the same power as mismatch arises on the array
Bayes and Non-Bayes Estimation Methods for the Parameter of Maxwell-Boltzmann Distribution
Full text linkIn this paper, point estimation for parameter ? of Maxwell-Boltzmann distribution has been investigated by using simulation technique, to estimate the parameter by two sections methods; the first section includes Non-Bayesian estimation methods, such as (Maximum Likelihood estimator method, and Moment estimator method), while the second section includes standard Bayesian estimation method, using two different priors (Inverse Chi-Square and Jeffrey) such as (standard Bayes estimator, and Bayes estimator based on Jeffrey's prior).
Comparisons among these methods were made by employing mean square error measure. Simulation technique for different sample sizes has been used to compare between these methods