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Search Results: 1 - 10 of 2535 matches for " Mehdi Aloosh "
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Seminal Plasma Magnesium and Premature Ejaculation: a Case-Control Study
Mohammadreza Nikoobakht,Mehdi Aloosh,Mohammad Hasani
Urology Journal , 2005,
Abstract: Introduction: Our aim was to determine the relationship between genuine premature ejaculation and serum and seminal plasma magnesium. Materials and Methods: In a case-control study carried out between January 2002 and December 2003, 19 patients with premature ejaculation were evaluated and compared with 19 patients without premature ejaculation. Patients with organic and psychogenic causes were excluded. Seminal plasma and serum magnesium levels were measured using atomic absorption spectrophotometery. Results: Seminal plasma magnesium levels in study patients (94.73 ± 10.87 mg/L) were significantly lower than they were in controls (116.68 ± 11.63 mg/L, P < 0.001), but there were no such differences regarding serum magnesium levels (study patients, 20.26 ± 2.66 mg/L; controls, 20.73 ± 2.80 mg/L). Semen–to–serum-magnesium ratio was significantly lower in patients with premature ejaculation (P < 0.001). Also, a reverse relationship between body mass index and genuine premature ejaculation was found (P = 0.027).Conclusion: Genuine premature ejaculation has a significant relationship with decreased levels of seminal plasma magnesium. Further studies are needed to clarify the actual role of magnesium in the physiology of the male reproductive tract, especially its association with premature ejaculation.
The Role of Hypothyroidism in Male Infertility and Erectile Dysfunction
Mohammad Reza Nikoobakht,Mehdi Aloosh,Nafiseh Nikoobakht,Abdolrasoul Mehrsai
Urology Journal , 2012,
Abstract: Purpose: To evaluate the effect of hypothyroidism on erectile function and sperm parameters. Materials and Methods: This study was conducted on 24 patients with hypothyroidism and 66 normal individuals. Serum levels of hormones, including thyroid stimulating hormone (TSH), thyroxin (T4), follicle-stimulating hormone (FSH), luteinizing hormone (LH), prolactin (PRL), and testosterone, were measured and semen analysis was done in all the participants. Erectile function was evaluated using International Index of Erectile Function (IIEF-5) questionnaire. Results: The mean IIEF-5 total score was 11.75 [95% confidence interval (CI): 9.70 to 13.79) and 20.81 (95% CI: 20.02 to 21.6) for hypothyroid group and normal subjects, respectively (P = .005). Furthermore, serum concentrations of PRL and seminal parameters were significantly different between two groups (P < .001). Conclusion: Hypothyroidism adversely affects erectile function and sperm parameters, including sperm count, morphology, and motility. In patients with sperm abnormalities and erectile dysfunction, measurement of thyroid hormones is recommended.
Peri-Ictal Urinary Dysfunction in Patients With Epilepsy: A Cross-Sectional Study
Mahmoud Motamedi,Mohammad Reza Nikoobakht,Mehdi Aloosh,Sara Ebrahimi Nasrabady
Urology Journal , 2011,
Abstract: Purpose: To evaluate the prevalence of peri-ictal urinary symptoms and their association with seizure type in patients with epilepsy. Materials and Methods: A total of 115 patients with epilepsy were recruitedconsecutively from neurology clinic between January 2006 and January 2008.Peri-ictal period was defined as the period ranging from 2 minutes prior to seizure attack up to 48 hours after it, and post-ictal period was the time upto 48 hours after regaining consciousness. Peri-ictal urinary complaints were gathered with interview and data were analyzed using Pearson’s Chi-square, Fisher’s Exact test, and independent sample t test.Results: The study population consisted of 57 (49.5%) men and 58 (50.4%) women, with the mean age of 26.83 ± 10.01 years. The frequency of at least one urinary symptom in studied patients was 39.1%. Incontinence, frequency, urgency, retention, and hesitancy were reported by 28 (24.3%), 14 (12.2%), 19 (16.5%),10 (8.7%), and 8 (7%) patients, respectively. Women expressed more symptoms than men and a higher frequency of peri-ictal retention. Although overallurinary complaints were more frequent in patients with partial seizures, there was a higher frequency of urgency in patients with partial seizure (P = .037).Furthermore, apart from retention, there was no significant correlation between peri-ictal urinary symptoms and the patients’ age. Conclusion: Our findings suggest that peri-ictal urologic dysfunction is a common problem among patients with epilepsy and post-ictal urinary retention might also be considered as a post-ictal deficit (Todd’s deficit).
Is Intravenous Urography Required When Ultrasonography and KUB Evidence a Ureteroscopy Plan?
Seyed Mohammad Kazem Aghamir,Seyed Saeed Modaresi,Alborz Salavati,Mehdi Aloosh
Urology Journal , 2012,
Abstract: Purpose: To determine whether pre-ureteroscopic stone extraction (USE) evaluation by intravenous urography (IVU) can change the clinical decision made on the basis of a plain X-ray of the kidneys, ureters, and bladder (KUB) plus an ultrasonography in the case of ureteral calculi.Materials and Methods: From October 2005 to November 2007, 139 USE candidates were selected based on ultrasonography and KUB, and were randomly divided into two groups. Each group was assessed by an expert urologist to decide about the treatment plans. Thereafter, all the patients underwent an IVU pre-operatively and were evaluated for the second time by the other urologist considering IVU. Presence of a hydronephrotic kidney on the ultrasonography, existence of a density in the probable tract of the ureter on KUB, and previous episodes of renal colic were considered as inclusion criteria. Exclusion criteria were non-opaque stones on KUB, hypersensitivity to contrast media, and serum creatinine > 1.5 mg/dL.Results: On the basis of ultrasonography and KUB assessement, all of the patients were identified candidate for USE. According to secondary IVU-based planning, of 139 patients, 127 (91.3%) required USE, 10 (7.1%) ureteroscopy, and 2 (1.4%) non-operative treatment. About 8.7% of treatment plans was changed by IVU, which was not statistically significant (P = .35). Positive predictive value of ultrasonography plus KUB to diagnose a ureteral stone which needed USE was 92.8% while IVU is the gold standard (95% confidence interval: 92.38 to 93.22).Conclusion: Intravenous urography is not useful enough to be performed routinely before entire USEs.
The Future of Snapchat: A Mathematical Model  [PDF]
Salma M. Al-Tuwairqi, Bushra K. Aloosh, Rana A. Bagies
Journal of Applied Mathematics and Physics (JAMP) , 2019, DOI: 10.4236/jamp.2019.74057
Abstract: Saudi Arabia has become one of the leading top five countries based on the number of Snapchat users as of October 2018. In this project, we build a novel mathematical model to explore the future of Snapchat in general and in Saudi Arabia particularly. The model incorporates the trend of “famous Snapchatters” that is highly observed in Saudi Arabia. The model is governed by a system of nonlinear differential equations. We analyze the system qualitatively and numerically. As a result, three equilibrium points are obtained. By considering their stability, we outline different possible scenarios for the future of Snapchat. Moreover, parameter analysis is performed to investigate key parameters in the model. Furthermore, an online survey is conducted to estimate the values for the parameters in the model to explore which scenario is likely to happen in Saudi Arabia.
A simple 2D interpolation model for analysis of nonlinear data  [PDF]
Mehdi Zamani
Natural Science (NS) , 2010, DOI: 10.4236/ns.2010.26080
Abstract: To determination the volume and weight of non uniform bodies, such as in ore deposits evaluation for mining and rock cutting for construction, the methods of interpolation are usually used. The classic curves, which are frequently used to interpolate onedimensional data are cubic spl ine, Bspline and Bezier curves. These methods have good efficiency for determination of geom etric characteristics of nonregular masses. They have some limitations and problems with two dimensional interpolation analysis such as for ming large linear systems of equations with a lot of entries and difficulty encounter with their solutions. In this research the twodimensional splines are used, which have the advantages of simplicity and less computational operations ef fort. The spline functions that are applied have the continuity of C1 at elements boundaries. The presented model has suitable efficiency for vo lumes of large extents governing to lots of data.
Application of He’s Variational Iteration Method and Adomian Decomposition Method to Solution for the Fifth Order Caudrey-Dodd-Gibbon (CDG) Equation  [PDF]
Mehdi Safari
Applied Mathematics (AM) , 2011, DOI: 10.4236/am.2011.28131
Abstract: In this work we use the He’s variational iteration method and Adomian decomposition method to solution N-soliton solutions for the fifth order Caudrey-Dodd-Gibbon (CDG) Equation.
Analytical Solution of Two Extended Model Equations for Shallow Water Waves By Adomian’S Decomposition Method  [PDF]
Mehdi. Safari
Advances in Pure Mathematics (APM) , 2011, DOI: 10.4236/apm.2011.14042
Abstract: In this paper, we consider two extended model equations for shallow water waves. We use Adomian’s decomposition method (ADM) to solve them. It is proved that this method is a very good tool for shallow water wave equations and the obtained solutions are shown graphically.
Application of He’s Variational Iteration Method for the Analytical Solution of Space Fractional Diffusion Equation  [PDF]
Mehdi Safari
Applied Mathematics (AM) , 2011, DOI: 10.4236/am.2011.29150
Abstract: Spatially fractional order diffusion equations are generalizations of classical diffusion equations which are increasingly used in modeling practical super diffusive problems in fluid flow, finance and others areas of application. This paper presents the analytical solutions of the space fractional diffusion equations by variational iteration method (VIM). By using initial conditions, the explicit solutions of the equations have been presented in the closed form. Two examples, the first one is one-dimensional and the second one is two-dimensional fractional diffusion equation, are presented to show the application of the present techniques. The present method performs extremely well in terms of efficiency and simplicity.
A simple piecewise cubic spline method for approximation of highly nonlinear data  [PDF]
Mehdi Zamani
Natural Science (NS) , 2012, DOI: 10.4236/ns.2012.41012
Abstract: Approximation methods are used in the analysis and prediction of data, especially laboratory data, in engineering projects. These methods are usually linear and are obtained by least-square-error approaches. There are many problems in which linear models cannot be applied. Because of that there are logarithmic, exponential and polynomial curve-fitting models. These nonlinear models have a limited application in engineering problems. The variation of most data is such that the nonlinearity cannot be approximated by the above approaches. These methods are also not applicable when there is a large amount of data. For these reasons, a method of piecewise cubic spline approximation has been developed. The model presented here is capable of following the local nonuniformity of data in order to obtain a good fit of a curve to the data. There is C1 continuity at the limits of the piecewise elements. The model is tested and examined with four problems here. The results show that the model can approximate highly nonlinear data efficiently.
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