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Search Results: 1 - 10 of 327606 matches for " S. Abbas Shobeiri "
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Biomechanical Mapping of the Female Pelvic Floor: Prolapse versus Normal Conditions  [PDF]
Vladimir Egorov, S. Abbas Shobeiri, Peter Takacs, Lennox Hoyte, Vincent Lucente, Heather van Raalte
Open Journal of Obstetrics and Gynecology (OJOG) , 2018, DOI: 10.4236/ojog.2018.810093
Abstract: Background: Quantitative biomechanical characterization of pelvic supportive structures and functions in vivo is thought to provide insight into pathophysiology of pelvic organ prolapse (POP). An innovative approach—vaginal tactile imaging—allows biomechanical mapping of the female pelvic floor to quantify tissue elasticity, pelvic support, and pelvic muscle functions. The Vaginal Tactile Imager (VTI) records high definition pressure patterns from vaginal walls under an applied tissue deformation and during pelvic floor muscle contractions. Objective: To explore an extended set of 52 biomechanical parameters for differentiation and characterization of POP relative to normal pelvic floor conditions. Methods: 96 subjects with normal and POP conditions were included in the data analysis from multi-site observational, case-controlled studies; 42 subjects had normal pelvic floor conditions and 54 subjects had POP. The VTI, model 2S, was used with an analytical software package to calculate automatically 52 biomechanical parameters for 8 VTI test procedures (probe insertion, elevation, rotation, Valsalva maneuver, voluntary muscle contractions in 2 planes, relaxation, and reflex contraction). The groups were equalized for subject age and parity. Results: The ranges, mean values, and standard deviations for all 52 VTI parameters were established. 33 of 52 parameters were identified as statistically sensitive (p < 0.05; t-test) to the POP development. Among these 33 parameters, 11 parameters show changes (decrease) in tissue elasticity, 8 parameters
Vaginal Robotic Supracervical Hysterectomy in an Ovine Animal Model: The Proof of Concept  [PDF]
Jonia Alshiek, Liron Bar-El, S. Abbas Shobeiri
Open Journal of Obstetrics and Gynecology (OJOG) , 2019, DOI: 10.4236/ojog.2019.98108
Abstract: Objective: To gain insight into the feasibility and safety of a novel vaginal robot for performing supracervical hysterectomy in an ovine model. Introduction: The clinical application of transvaginal natural or fice transluminal endoscopic surgery (vNOTES) has broadened significantly. vNOTES reduces wound complications such as infection, hematoma formation, or herniation and is currently utilized for hysterectomy, adnexal surgery, myomectomy, and staging surgery for endometrial cancer. Robotic assistance has been proposed to overcome the current vNOTES mechanical obstacles. The implementation of the current robots has limited utility due to their bulk and inflexibility. Robotic Natural Orifice Transluminal Surgery (rNOTES) is the new frontier in advancement of surgical robots. In developing new task specific robots, it is important to utilize an accurate model for testing. A novel vaginal robot introduced through the posterior cul-de-sac to perform a complete retrograde hysterectomy is the subject of this study. Methods: The study was conducted at the animal lab, Asaf-Harofe hospital, Israel. The ovine model was preferred since the anatomical landmarks and vascular anatomy are comparable to the human except for a bicornuate uterus in sheep. A vaginal robotic supra-cervical hysterectomy was performed in a sheep. Results: A vaginal robotic supracervical hysterectomy was performed successfully in an ovine model. The uterus was extracted via the entry point in the pouch of Douglas. 20 cc of blood loss was reported and no complications were observed. Conclusions: Vaginal supracervical hysterectomy via a vaginal approach using a novel robotic system was found to be feasible.
The Utility of Endovaginal Ultrasound in the Design of a Sacrospinous Ligament Anchoring Device in Patients with and without Pelvic Organ Prolapse  [PDF]
Jonia Alshiek, Qi Wei, Lieschen H. Quiroz, Mikio A. Nihira, Menahem Neuman, S. Abbas Shobeiri
Open Journal of Obstetrics and Gynecology (OJOG) , 2019, DOI: 10.4236/ojog.2019.98107
Abstract: Objective: To determine whether endovaginal ultrasound is a reliable measure in visualization of the sacrospinous ligament among women with prolapse versus women without prolapse, and thus might be clinically applicable in the design of an ultrasound-guided device for performing sacrospinous ligament anchor placement as a treatment for pelvic organ prolapse. Methods: In the first phase of this study we performed a sacrospinous anchor placement in four normal fresh-frozen female pelves. Afterwards, an endovaginal ultrasound was performed to visualize the anchor localization which was validated by dissection of the cadaveric pelves. In the second phase of the study: two groups of volunteer females with and without pelvic organ prolapsed (POP-group, vs NON-POP group) were evaluated by endovaginal ultrasound to localize the sacrospinous ligament. Results: Cadaveric dissection demonstrated accurate anchor placement into the 8/8 sacrospinous ligament. We performed endovaginal ultrasound in a total of 17 N-POP and 10 (POP) patients. Among the N-POP group, the right and left ischial spines were visible in 6/17 (35%) and (6/17) 35% vs 0/10 (0%) for both right and left sides in POP group (p = 0.008). The right sacrospinous ligament was visualized in 4/17 (23%) N-POP subjects and 0/10 POP subjects (p = 0.27) and the left sacrospinous ligament was visualized in 7/17 (41%) N-POP subjects and 2/10 POP subjects (p = 0.48). Conclusions: Sacrospinous ligament and the ischial spines couldn’t be reliably visualized among women with or without pelvic organ prolapse using endovaginal ultrasound, although the structures are visualized more in some of the non-prolapsed women. The sacrospinous anchoring device demonstrated accurate placement by cadaveric dissections.
Vaginitis in Intrauterine Contraceptive Device Users  [PDF]
Fatemeh Shobeiri, Mansour Nazari
Health (Health) , 2014, DOI: 10.4236/health.2014.611149
Abstract: Objectives: This study aimed to assess clinical, microbial changes in IUD users and other contraceptive methods in referent to urban health centers in Hamadan city, Iran. Methods: Detailed history and gynecological examination were conducted on women (IUD users, n = 100) or other contraceptive methods (controls, n = 160) in the health centers. Results: Frequencies of the different vaginal pathogens, high indices of infection by bacterial vaginosis (12.0%) candida albicance (7.0%) and low indices of trichomoniasis (5.0%) were found in present study, but none of them in both groups was significant. Menorrhagia was more frequent among women with IUD than that among women without IUD (P < 0.05). A trend of erosion cervix and dysmenorrhea being more frequent among women with IUD was also found (P < 0.05). Conclusions: IUD is the safety in general; however, an increase occurred in the frequency of vaginitis.
Analysis of Material Behavior for Friction in a Nozzle for Turbomachinery and High Speed Vehicles  [PDF]
S. M. Prabhu, Abbas Mohadeen
Materials Sciences and Applications (MSA) , 2011, DOI: 10.4236/msa.2011.210200
Abstract: Shock-induced separation of turbulent boundary layers represents a long-studied problem in compressible flow, bearing, for example, on applications in high speed aerodynamics, rocketry, wind tunnel design, and turbomachinery. Experimental investigations have generally sought to expose essential physics using geometrically simple configurations.
3D Nonlinear XFEM Simulation of Delamination in Unidirectional Composite Laminates: A Sensitivity Analysis of Modeling Parameters  [PDF]
Damoon Motamedi, Abbas S. Milani
Open Journal of Composite Materials (OJCM) , 2013, DOI: 10.4236/ojcm.2013.34012
Abstract: This article presents a three-dimensional extended finite element (XFEM) approach for numerical simulation of delamination in unidirectional composites under fracture mode I. A cohesive zone model in front of the crack tip is used to include interface material nonlinearities. To avoid instability during simulations, a critical cohesive zone length is defined such that user-defined XFEM elements are only activated along the crack tip inside this zone. To demonstrate the accuracy of the new approach, XFEM results are compared to a set of benchmark experimental data from the literature as well as conventional FEM, mesh free, and interface element approaches. To evaluate the effect of modeling parameters, a set of sensitivity analyses have also been performed on the penalty stiffness factor, critical cohesive zone length, and mesh size. It has been discussed how the same model can be used for other fracture modes when both opening and contact mechanisms are active.
Taguchi Optimization of Process Parameters in Friction Stir Welding of 6061 Aluminum Alloy: A Review and Case Study  [PDF]
Mohamadreza Nourani, Abbas S. Milani, Spiro Yannacopoulos
Engineering (ENG) , 2011, DOI: 10.4236/eng.2011.32017
Abstract: This study is intended to present a straightforward and computationally efficient methodology for optimizing the process parameters of friction stir welding (FSW) of 6061 aluminum alloy. In particular, it is shown how to minimize the heat affected zone (HAZ) distance to the weld line in the joined parts using a Taguchi optimization method and a temperature-field finite element model. The peak temperature during the process has also been minimized. Since the method is used for the first time in relation to the HAZ objective function, an auxiliary full factorial search is conducted to ensure Taguchi’s orthogonal design assumption for the FSW problems. Results confirm that the method can be suc-cessfully used for minimizing both the HAZ distance to the weld line and the peak temperature, with a minimal number of simulation runs via orthogonal arrays. In addition, a new ANOVA analysis on the L9 orthogonal array with three factors is performed and results indicate that among the parameters considered (i.e., the tool rotational speed, transverse speed, and the axial force), the most significant parameter on the weld quality is the rotational speed, followed by the axial force and transverse speed.
Thermal and Mechanical Modeling of Fluid and Heat Flow in a Porous Metal Using Neural Networks for Application as TPS in Space Vehicles  [PDF]
Prabhu S. M, Abbas Soundarajan Mohadeen
American Journal of Computational Mathematics (AJCM) , 2011, DOI: 10.4236/ajcm.2011.12015
Abstract: This paper contains novel model using feedback neural networks for a work piece temperature predic- tion.The heat and mass transfer in a porous metal workpiece which is heated by a fire gun is studied. The heat flux distribution is determined by thermocouple connected on the workpiece at definite distances. The gun work piece distance were also change and the temperature distribution and heat flux were determined. The permeability’s were in range of 0.01 – 0.15 .The ANN model parameters of the result output were simu- lated using the ANN parameters The simulation was done using MATLAB 6.0® Neural Network Toolbox.
The Problems of Rebuilding a State in Iraq 2003-2015  [PDF]
Murad A. Abbas, Radhi S. Jassam
Open Journal of Political Science (OJPS) , 2015, DOI: 10.4236/ojps.2015.54026
Abstract: The process of rebuilding the new state in Iraq has faced many internal and external problems. This study is going to focus on the internal problems; they are represented by the problem of national identity, setting the basis of the new Iraqi state, democracy, federalism, national reconciliation and governmental corruption. We selected those problems because we agreed with the consensus among Iraqi academic & political forces on attributing the continuity of instability & the increasing number of human casualties in Iraq to those specific problems. So, we think that solving those problems in accordance with strong national laws will lead to secure the building of Iraqi democratic state capable of making peaceful coexistence among its components based on their public acceptance to principles of liberty, citizenship, equality, pluralism and the separation of powers.
Dangers of Forming New Federal Regions in Iraq on Ethnic-Sectarian Bases  [PDF]
Murad A. Abbas, Radhi S. Jassam
Open Journal of Political Science (OJPS) , 2016, DOI: 10.4236/ojps.2016.63028
Abstract: This paper is an objective opinion of Iraqi professors, specialized in political science. It is concerning the application of federalism in Iraq. It deals with the problems created by the adoption of the federal system in Iraq after the year 2003. Iraqis are not yet prepared to work through such system, which has not developed through their own needs. After they will be finished with the ISIS, they will have to expand the application of the federal system throughout Iraq. Such an act will create many problems. If the new federal regions formed on a sectarian principle, this would cause higher instability in Iraq. In order to avoid having such problems, we need to strengthen the federal government through granted it more powers and authorities, so that, it could absorb peacefully the problems of the formation of new federal regions.
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