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Search Results: 1 - 10 of 19891 matches for " Mohamad Ali SadighiGilani "
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Optimal Number of Biopsies andImpact of Testicular Histology on the Outcome of Testicular Sperm Extraction
Farid Dadkhah,Seyed Jalil Hosseini,Mohamad Ali SadighiGilani,Faramarz Farrahi
Urology Journal , 2013,
Abstract: PURPOSE:To determine the optimal number of biopsies in patients with non-obstructive azoospermia (NOA) who undergo testicular sperm extraction (TESE), and assess the impact of testicular histology on outcome.MATERIALS AND METHODS: Seven hundred and forty-one patients with NOA who underwent TESE in our institution were enrolled in the study. Testicular sperm extraction was performed applying an open surgical technique on the larger testis. The number of biopsies varied according to the presence or absence of spermatozoa. No further biopsies were obtained once spermatozoa were detected. If no spermatozoa were seen, the procedure was continued to a maximum number of 5 biopsies, including a single biopsy of the contralateral testis. RESULTS: Spermatozoa were obtained in 330 (44.5%) patients after a single biopsy. The success rate increased to 381 (51.4%), 416 (56.1%), 433 (58.4%), and 441 (59.5%) after the second, third, fourth, and contralateral sampling, respectively. Multiple sampling increased the success rate; however, success rate did not increase considerably after the third sampling. Performing contralateral testicular biopsy was advantageous in patients with uniform or mixed pattern hypospermatogenesis.CONCLUSION:We recommend performing at least 3 biopsies in patients with NOA who undergo TESE. Further biopsies may also be advantageous when the NOA is a consequence of either uniform or mixed pattern hypospermatogenesis.
Phenotyping Winter Dormancy in Switchgrass to Extend the Growing Season and Improve Biomass Yield  [PDF]
Rasyidah Mohamad Razar, Ali Missaoui
Journal of Sustainable Bioenergy Systems (JSBS) , 2018, DOI: 10.4236/jsbs.2018.81001
Abstract: Switchgrass is a prominent bioenergy crop. Like most perennial warm season species, switchgrass undergoes growth suspension in winter as a surviving strategy in temperate climates to protect their meristems from cold injuries and dehydration, while storage organs below ground drive spring regrowth when conditions become favourable. In this paper, we describe a reliable phenotyping method for winter dormancy in switchgrass using various traits including regrowth height after clipping in early fall (FRH), senescence percentage, date of spring regrowth (SRD), and flowering date (FD). FRH and senescence percentage appear to be reliable indicators of the onset of winter dormancy, whereby accessions that initiated dormancy early have a low FRH and a high senescence percentage. Even though it is difficult to have an exact assessment of the duration of dormancy because it is hard to determine with precision the date of growth suspension, SRD can be used as a surrogate indicator of the duration. Flowering date showed low correlations with all the traits and biomass yield suggesting that it may not be a reliable indicator for winter dormancy in switchgrass. Combining the variables FRH, senescence, and SRD in a selection index may provide a reliable tool to phenotype winter dormancy in switchgrass. The strong correlation of these variables with biomass yield makes them useful candidates for the manipulation of the duration of dormancy to increase the growing season and consequently improving biomass production. In southern regions with mild winters, it might be possible through intense selection to develop germplasm with much reduced dormancy or even non-dormant switchgrass germplasm.
Interest of Ventricular Assist Device in Peripartum Cardiomyopathy, a Case Report and Review Article*  [PDF]
Righab Hamdan, Pierre Nassar, Ali El Zein, Firass Ali, Mohamad Issa, Mohamad Chaar, Mohamad Saab
World Journal of Cardiovascular Surgery (WJCS) , 2013, DOI: 10.4236/wjcs.2013.32010
Abstract: We report a case of severe post partum cadiomyopathy in severe cardiogenic shock, treated successfully and urgently with the implantation of Left Ventricular Assist device. The patient recovered a normal left ventricle function shortly after implantation. This case illustrates the crucial place of left ventricular assist device in severe post partum cardiomyopathy as a bridge to recovery as well as a bridge to transplantation.


Examining the Relationship of Optimism and Emotion Regulation Strategies with General Health among Students of University of Sistan and Baluchestan  [PDF]
Hossein Jenaabadi, Mohamad Ali Ahani, Faramarz Sabaghi
Health (Health) , 2015, DOI: 10.4236/health.2015.77102
Abstract: Background and Objective: Individuals apply various emotion regulation strategies, some of which are adaptive and others are maladaptive affecting people’s general health. Moreover, individual life-orientation including favorable expectancies about future (optimism) is associated with health-related behaviors. The purpose of the present study was to investigate the relationship of optimism and emotion regulation strategies with general health of university students. Materials and Methods: This was a correlational study. In this regard, 182 students of University of Sistan and Baluchestan (70 males and 112 females) were chosen. The statistical population of the present study consisted of all undergraduate students of the university of Sistan and Baluchestan in the second semester of the 2009-2010 academic year. Considering the nature of the current study, the correlational method was applied. Based on Krejcie and Morgan’s table, a sample of 200 subjects was selected from students majored at different fields including human sciences, basic sciences and technical-engineering through applying multi-stage random sampling method. Eighteen incomplete questionnaire forms were excluded. Finally, data obtained from 182 subjects (112 females, 70 males) were analyzed. The mean age was 21.1 year-old and standard deviation of the sample was 2.06. Samplings were assessed using the Revised Life-Orientation Test (LOT-R), Emotion Regulation Questionnaire (ERQ) and General Health-28 Questionnaire (GHQ-28). Data were analyzed using the Pearson correlation coefficient and regression analysis. Results: Findings showed that there was a significant positive relationship between optimism and general health (r = 0.22, p < 0.01). Among all research variables, i.e. optimism and emotion regulation strategies (cognitive reappraisal and expressive suppression), only optimism was able to predict 0.06 percent of variance of general health (p < 0.001). Conclusion: Optimists have higher general health and consistent with other findings, optimism is associated with higher levels of applying coping strategies and lower levels of avoidance.
HiMAC: Hierarchical Message Authentication Code for Secure Data Dissemination in Mobile Ad Hoc Networks  [PDF]
Khaleel Mershad, Ali Hamie, Mohamad Hamze
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2017, DOI: 10.4236/ijcns.2017.1012018
Abstract: Mobile ad-hoc networks are wireless self-organized networks in which mobile nodes can connect directly to each other. This fact makes such networks highly susceptible to security risks and threats, as malicious nodes can easily disguise as new trusted nodes and start attacking the network after a certain period of time. Hence, the security of data transmission in MANET has been a hot topic in the past years. Several research works attempted to detect and stop various attacks on MANET nodes and packets. This paper presents an efficient mechanism for secure data dissemination in MANETs. Our approach is based on the identity based cryptography and Message Authentication Code (MAC). The proposed security mechanism prevents malicious nodes from tampering or replaying intermediate packets by means of signing and encrypting the packet at each intermediate trusted node. We tested the efficiency of our system using the ns2 simulator by comparing it to a similar security mechanism. The simulations illustrate that our approach obtains many advantages over other existing approaches for secure data dissemination in MANETs.
CARBONACEOUS, NITROGENOUS AND PHOSPHORUS MATTERS REMOVAL FROM DOMESTIC WASTEWATER BY AN ACTIVATED SLUDGE REACTOR OF NITRIFICATION-DENITRIFICATION TYPE
MOHAMAD ALI FULAZZAKY
Journal of Engineering Science and Technology , 2009,
Abstract: This paper proposes an environmental engineering method based on biotechnology approach as one of the expected solutions that should be considered to implementing the activated sludge for improving the quality of water and living environment, especially to remove the major pollutant elements of domestic wastewater. Elimination of 3 major pollutant elements, i.e., carbon, nitrogen and phosphor containing the domestic wastewater is proposed to carry out biological method of an anoxic-aerobic reactor therein these types of pollutants should be consecutively processed in three steps. Firstly, eliminate the carbonaceous matter in the aerobic reactor. Secondly, to remove the carbonaceous and nitrogenous matters, it is necessary to modify the reactor’s nature from the aerobic condition to an anoxic-aerobic reactor. And finally, when the cycle of nitrification-denitrification is stable to achieve the target’s efficiency of reactor by adding the ferric iron into the activated sludge, it can be continued to remove the carbonaceous, nitrogenous and phosphorous matters simultaneously. The efficiency of carbonaceous and nitrogenous matters removal was confirmed with the effluent standard, COD is less than 100 mgO2/L and the value of global nitrogen is less than 10 mgN/L. The effectiveness of suspended matter removal is higher than 90% and the decantation of activated sludge is very good as identifying the Molhman’s index is below of 120 mL/L. The total phosphorus matter removal is more effective than the soluble phosphorus matter. By maintaining the reactor’s nature at the suitable condition, identifying the range of pH between 6.92 and 7.16 therefore the excellent abatement of phosphor of about 80% is achieving with the molar Fe/P ratio of 1.4.
HYDATID CYST OF THE PAROTID GLAND
MOHAMAD-ALI EBRAHIMI
Acta Medica Iranica , 1987,
Abstract:
A FRAMEWORK FOR CHOOSING APPROPRIATE OPEN SOURCE LEARNING MANAGEMENT SYSTEM
Ahmad Zamzuri MOHAMAD ALI
The Turkish Online Journal of Distance Education , 2011,
Abstract: Fast evolving of e-learning technology has inspired teachers to adopt Learning Management System (LMS) as a platform for distance learning activities. LMS is a system used to plan, create, implements and assesses certain learning objective and majority of LMSes are web-based. Dozens of LMS product existence, either commercial or open source has provide wide choices for teachers in selecting the best LMS that suits their need. Since commercial LMSes are costly and not many teachers are willing to spend to have it, open source LMSes has become the credible substitutes to these commercial LMSes. However, based on the observation, whenever open source LMS is mentioned MOODLE will appear in most of the teachers mind. Implication of this, teachers often find themselves altering their needs to suit the LMS, not because it is the right thing to do, but because it is the only choice preferred by them. Selecting the appropriate LMS should starts with identifying the learning objectives and strategies in order to find the suitable open source LMS that will suit initial and subsequent requirements. Therefore, this paper intends to propose a framework or guideline in selecting appropriate open source products. The framework was developed based on experience, research and literature review done. This paper will also introduce some potential open source LMSes and its features that might be helpful in identifying the potential open source LMS that suits our learning objectives requirement. The features are identified by exploring the respective LMS’s test site.
Complex centers of polynomial differential equations
Mohamad Ali M. Alwash
Electronic Journal of Differential Equations , 2007,
Abstract: We present some results on the existence and nonexistence of centers for polynomial first order ordinary differential equations with complex coefficients. In particular, we show that binomial differential equations without linear terms do not have complex centers. Classes of polynomial differential equations, with more than two terms, are presented that do not have complex centers. We also study the relation between complex centers and the Pugh problem. An algorithm is described to solve the Pugh problem for equations without complex centers. The method of proof involves phase plane analysis of the polar equations and a local study of periodic solutions.
Polynomial differential equations with piecwise linear coefficients
Mohamad Ali Alwash
Mathematics , 2010,
Abstract: Cubic and quartic non-autonomous differential equations with continuous piecewise linear coefficients are considered. The main concern is to find the maximum possible multiplicity of periodic solutions. For many classes, we show that the mutiplicity is the same when the coefficients are polynomial functions of degree n or piecewise linear functions with n segments.
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