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Search Results: 1 - 10 of 149807 matches for " Hazim H. Alhamzawi "
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Delayed Presentation of Traumatic Intraperitoneal Rupture of Urinary Bladder
Hazim H. Alhamzawi,Husham M. Abdelrahman,Khalid M. Abdelrahman,Ayman El-Menyar
Case Reports in Urology , 2012, DOI: 10.1155/2012/430746
Abstract:
Delayed Presentation of Traumatic Intraperitoneal Rupture of Urinary Bladder
Hazim H. Alhamzawi,Husham M. Abdelrahman,Khalid M. Abdelrahman,Ayman El-Menyar,Hassan Al-Thani,Rifat Latifi
Case Reports in Urology , 2012, DOI: 10.1155/2012/430746
Abstract: Blunt injury of the urinary bladder is well known and usually associates pelvic fractures. Isolated bladder injury is a rare condition and on the other hand, delayed bladder perforation is an extremely rare entity. Herein, we described an unusual case of isolated delayed intraperitoneal bladder rupture that occurred on the third post injury day in a young male in the absence of free intraperitoneal fluid and pelvic fracture. The diagnostic workup, course and the need for surgical repair of the injury is presented. 1. Introduction Around 60% to 85% of all bladder injuries result from blunt abdominal trauma (BAT) but the incidence of intraperitoneal urinary bladder (UB) rupture is relatively uncommon from blunt injuries [1]. Isolated UB rupture following blunt trauma has an insidious presentation, and often results in delayed diagnosis and management [2–8]. The mechanism of injury include sudden compression of the full bladder, shear forces, or a pelvic fracture [2, 3, 9]. Rupture of bladder may be presented with lower abdominal pain, inability to void, and perineal ecchymoses [3]. The cardinal sign of injury to the bladder is gross hematuria [6], which is present in more than 95% of cases, while only about 5% of the patients have microscopic hematuria alone [6, 7]. Over 80% of the patients with UB rupture had an associated pelvic fracture in centers with high percentage of blunt trauma. On the other hand around 6% of patients with pelvic fracture sustain a bladder injury [3, 6]. Diagnosis of bladder injury, several days after admission, could be either a missed diagnosis or a truly delayed rupture. Delayed diagnosis of bladder rupture may be associated with laboratory abnormalities such as metabolic derangements, and leukocytosis. Delay in the presentation and treatment may substantially increases mortality [7–10]. Therefore, early and accurate diagnosis with imaging techniques is imperative. Computed tomographic cystography (CTC) and/or retrograde cystography (RGC) are the standard imaging tools for the diagnosis of bladder injury [4–10]. We present a case of delayed rupture of UB due to blunt trauma without associated injuries. 2. Case Report A twenty three-year old male patient sustained BAT due to fall from a 3-meter height. Initial vital signs were: blood pressure136/80?mmHg, heart rate 64?BPM, respiratory rate 20 per minute, oxygen saturation of 100% on room air, and temperature of 36.9°C. Patient was fully conscious with neither external bleeding nor neurological deficits. Abdominal examination showed mild generalized tenderness and voluntary
The Vibrations Of A Beam With A Local Unilateral Elastic Contact
H. Hazim,Neil Ferguson,B. Rousselet
Physics , 2010,
Abstract: The mass reduction of satellite solar arrays results in significant panel flexibility. When such structures are launched there is a possible striking at one with another dynamically, leading ultimately to structural damage during the launch stage. To prevent this, rubber snubbers are mounted at well chosen points of the structure and they act as one sided linear spring; as a negative consequence, the dynamic of these panels becomes nonlinear. In this paper a solar array and a snubber are simply modeled as a linear Euler-Bernoulli beam with a one sided linear spring respectively. In this investigation, a numerical and an experimental study of a beam striking a one-sided spring under harmonic excitation is presented. The finite element approximation is used to solve the partial differential equations governing the structural dynamics. The models are subsequently validated and updated with experiments.
Penalized Flexible Bayesian Quantile Regression  [PDF]
Ali Alkenani, Rahim Alhamzawi, Keming Yu
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.312A296
Abstract: The selection of predictors plays a crucial role in building a multiple regression model. Indeed, the choice of a suitable subset of predictors can help to improve prediction accuracy and interpretation. In this paper, we propose a flexible Bayesian Lasso and adaptive Lasso quantile regression by introducing a hierarchical model framework approach to enable exact inference and shrinkage of an unimportant coefficient to zero. The error distribution is assumed to be an infinite mixture of Gaussian densities. We have theoretically investigated and numerically compared our proposed methods with Flexible Bayesian quantile regression (FBQR), Lasso quantile regression (LQR) and quantile regression (QR) methods. Simulations and real data studies are conducted under different settings to assess the performance of the proposed methods. The proposed methods perform well in comparison to the other methods in terms of median mean squared error, mean and variance of the absolute correlation criterions. We believe that the proposed methods are useful practically.

Parameter Analysis on Fruit Fly Optimization Algorithm  [PDF]
Hazim Iscan, Mesut Gunduz
Journal of Computer and Communications (JCC) , 2014, DOI: 10.4236/jcc.2014.24018
Abstract:

Fruit fly algorithm is a novel intelligent optimization algorithm based on foraging behavior of the real fruit flies. In order to find optimum solution for an optimization problem, fixed parameters are obtained as a result of manual test in fruit fly algorithm. In this study, it is aimed to find the optimum solution by analyzing the constant parameter concerning the direction of the algorithm instead of manual defining on initialization stage. The study shows an automated approach for finding the related parameter by utilizing grid search algorithm. According to the experimental results, it can be seen that this approach could be used as an alternative way for finding related parameter or other ones in order to achieve optimum model.

Power Prior Elicitation in Bayesian Quantile Regression
Rahim Alhamzawi,Keming Yu
Journal of Probability and Statistics , 2011, DOI: 10.1155/2011/874907
Abstract: We address a quantile dependent prior for Bayesian quantile regression. We extend the idea of the power prior distribution in Bayesian quantile regression by employing the likelihood function that is based on a location-scale mixture representation of the asymmetric Laplace distribution. The propriety of the power prior is one of the critical issues in Bayesian analysis. Thus, we discuss the propriety of the power prior in Bayesian quantile regression. The methods are illustrated with both simulation and real data.
Influence of Dietary Supplementation with Zinc on Sex Hormones Concentrations of Broiler Breeder Chickens
Mahmood H.M. Amen,Hazim J. Al- Daraji
Pakistan Journal of Nutrition , 2011,
Abstract: This study was conducted to determine the effect of supplementing the diet with different levels of zinc (0, 50, 75, 100 mg/kg of diet) on sex hormones concentrations of broiler breeder chickens. A total of 132 (96 females and 36 males) of Cobb 500 broiler breeder chicken, 45 weeks old were used in this study. These birds were randomly distributed equally into four dietary treatments with three replicates each. Each treatment group constituted of 32 females and 12 males. Treatment groups were as following: T1: Birds fed the basal diet without any addition (0 Zn) (control), T2: Birds fed diet supplemented with 50 mg Zn (pure zinc)/kg of diet, T3: Birds fed diet supplemented with 75 mg Zn (pure zinc)/kg of diet and T4: Birds fed diet supplemented with 100 mg Zn (pure zinc)/kg of diet. Concentration of testosterone hormone in bird males was determined at 54, 58 and 66 weeks of age, whereas concentrations of estrogen and progesterone hormones in bird females were determined at 54 and 66 weeks of age. Results of this study indicated that adding zinc to diet (T2, T3 and T4) resulted in significant (p<0.05) increase respecting blood plasma concentrations of estrogen and progesterone hormones during 54 and 66 weeks of age as compared with control group (T1). However, dietary supplementation with zinc (T2, T3 and T4) caused significant (p<0.05) increase concerning blood plasma concentration of testosterone hormone at 54, 58 and 66 weeks of age and as regards the overall means of this hormone in comparison with control group. In conclusion feeding diet containing zinc resulted in significant improvement respecting sex hormones (testosterone, estrogen, progesterone). Therefore, adding ration with zinc can be used as a beneficial tool for improving reproductive performance of broiler breeder chicken.
Effect of Dietary Supplementation with Different Level of Zinc on Sperm Egg Penetration and Fertility Traits of Broiler Breeder Chicken
Mahmood H.M. Amen,Hazim J. Al-Daraji
Pakistan Journal of Nutrition , 2011,
Abstract: The aim of the present study was to evaluate the effect of zinc as feed additive (0, 50, 75,100 mg/kg diet) on fertility traits and sperm egg penetration of Cobb 500 broiler breeders. A total 132 of (96 females and 36 males) of Cobb 500 broiler breeder chicken, 45 weeks old were used in this study. These birds were randomly distributed equally into four dietary treatments with three replicates each. Each treatment group constituted of 32 females and 12 males. Treatment groups were as following: T1: Birds fed the basal diet without any addition (0 Zn) (control), T2: Birds fed diet supplemented with 50 mg Zn (pure zinc)/kg of diet, T3: Birds fed diet supplemented with 75 mg Zn (pure zinc)/kg of diet and T4: Birds fed diet supplemented with 100 mg Zn (pure zinc)/kg of diet. Hens were artificially inseminated with semen from the same treatments during 51, 54, 57, 60, 63 and 66 weeks of bird ages. Fertility traits involved in this study were percentages of fertility, hatchability of total eggs, hatchability of fertile egg, embryonic mortality. However, sperm egg penetration during 54, 58, 62 and 66 weeks of bird age's. Results revealed that adding zinc to birds diet results in significant (p<0.05) increase regarding fertility, hatchability of total eggs, hatchability of fertile eggs and sperm egg penetration and significant (p<0.05) decrease as regards embryonic mortality. In conclusion supplementing the diet of bird with zinc resulted in significant improvement in fertility traits and sperm egg penetration. Therefore adding zinc to the diet of birds could be used as an efficient tool for improves reproductive performance of chicken.
Effect of Dietary Zinc on Semen Quality of Cobb 500 Broiler Breeder Males
Mahmood H.M. Amem,Hazim J. Al-Daraji
International Journal of Poultry Science , 2011,
Abstract: The purpose of the present research was to evaluate the effect of dietary supplementation with different levels of zinc (0, 50, 75, 100 mg/kg diet) on semen quality of Cobb500 broiler breeder males. The four experimental diets were as follows: T1 = the basal diet (control) without any addition (0 Zn). T2 = 50 mg Zn (pure zinc)/kg diet. T3 = 75 mg Zn (pure zinc)/kg diet T4 = 100 mg Zn (pure zinc)/kg diet. The results showed that, Zinc supplementation had significantly (p<0.05) increased spermatocrit, ejaculate volume, mass motility, individual motility, while dead, abnormal sperm percentage and acrosome deformities were depressed (p<0.05) as affected by zinc supplementation throughout study. As well as, dietary treatments influenced sperm concentration and ejaculate volume during the experimental long. Moreover, results also revealed the superiority (p<0.05) of dietary treatments as compared with control group in respect of total mean of all semen quality.
Effect of Dietary Zinc on Certain Blood Traits of Broiler Breeder Chickens
Hazim J. Al-Daraji,Mahmood H.M. Amen
International Journal of Poultry Science , 2011,
Abstract: The aim of the present study was to evaluate the effect of zinc as feed additive on some the blood plasma traits of males and females of broiler breeder chickens. A total 132 (96 females and 36 males) of Cobb 500 broiler breeder chickens, 45 weeks old were used in this study. These birds were randomly distributed into four dietary treatment groups with three replicates each. Each treatment group constituted of 24 females and 9 males. Treatment groups were as following: T1: Birds fed the basal diet without any addition of zinc (0 Zn) (Control), T2: Birds fed diet supplemented with 50 mg Zn (pure zinc)/kg of diet, T3: Birds fed diet supplemented with 75 mg Zn (pure zinc)/kg of diet and T4: Birds fed diet supplemented with 100 mg Zn (pure zinc)/kg of diet. Results indicated that dietary zinc supplementation (T2, T3 and T4) resulted in significant (p<0.05) increase in blood plasma cholesterol, protein, calcium and phosphorus concentration and Alkaline Phosphatase (ALP) activity in broiler breeders males and females during 58 and 66 weeks of age and as regards the total means of these traits as compared with control group (T1). However, adding different levels of zinc to the diet (T2, T3 and T4) resulted in significant (p<0.05) increase in blood plasma glucose in broiler breeders males and females during 54, 58, 62 and 66 weeks of age and concerning the total mean of this trait. In conclusion, supplementing the diet of broiler breeder chickens with zinc caused significant increase in blood plasma traits included in this study. Therefore, zinc can be used as efficient feed additive for enhance physiological status of birds.
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