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Search Results: 1 - 10 of 1913 matches for " Mohamad Eid Hammadeh "
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Overview of pelvic floor failure and associated problems
Khaled Refaat,Constanze Fischer-Hammadeh,Mohamad Eid Hammadeh
Urogynaecologia International Journal , 2012, DOI: 10.4081/uij.2012.e2
Abstract: Pelvic organ prolapse POP, including anterior and posterior vaginal prolapse, uterine prolapse, and enterocele, is a common group of clinical conditions affecting millions of women worldwide. The aim of this review is to highlight the clinical importance of prolapse, its pathophysiology, and different modalities for diagnosis and treatment. POP includes a range of disorders, from asymptomatic disturbed vaginal anatomy to complete vaginal eversion associated with considerable degrees of urinary, defecatory, and sexual dysfunction. The pathophysiology of prolapse is multifactorial however genetically susceptible women are more exposed to life events that result in the development of clinically significant prolapse. The evaluation of women with prolapse requires a comprehensive approach, with focusing on the function in all pelvic compartments based on a detailed patient history, physical examination, and investigations. Although prolapse is associated with many symptoms, few are specific for prolapse; it is often a challenge for the clinician to determine which symptoms are prolapse-specific and will therefore improve or resolve after prolapse treatment. Prolapse treatment is based on specific symptoms moreover its management options fall into two broad categories: nonsurgical, which includes pelvic floor muscle training and pessary use; and surgical, which can be reconstructive or obliterative. Associated symptoms require additional management. All women with prolapse can be treated and their symptoms improved, even if not completely resolved.
Reactive Oxygen Species and Antioxidant in Seminal Plasma and Their Impact on Male Fertility
Mohammad Eid Hammadeh,Alixides Filippos A,Mohammed Faiz Hamad
International Journal of Fertility & Sterility , 2009,
Abstract: Spermatozoa generate reactive oxygen species (ROS) in physiological amounts, which play arole in sperm functions during sperm capacitation, acrosome reaction (AR), and oocyte fusion. Inaddition, damaged sperm are likely to be the source of ROS. The most important ROS producedby human sperm are hydrogen peroxide, superoxide anion and hydroxyl radicals. Besides, humanseminal plasma and sperm possess an antioxidant system to scavenge ROS and prevent ROS relatedcellular damage. Under normal circumstances, there is an appropriate balance between oxidants andantioxidants. A shift in the levels of ROS towards pro-oxidants in semen can induce oxidative stress(OS) on spermatozoa.Male infertility is associated with increased ROS and decreased total antioxidant activity in theseminal plasma. ROS induce nuclear DNA strand breaks. Besides, due to a high polyunsaturatedfatty acid content human sperm plasma membranes are highly sensitive to ROS induced lipidperoxidation thus decreasing membrane fluidity. This will result in increased lipid peroxidation(LPO), decreased sperm motility, viability, function and ultimately lead to infertility. The protectiveaction of antioxidants against the deleterious effect of ROS on cellular lipids, proteins and DNA hasbeen supported by several scientific studies.The purpose of the present review is to address the possible relationship between ROS andantioxidants production in seminal plasma, and the role they may play in influencing the outcomeof assisted reproductive technology (ART).
LAMAIDS: A Lightweight Adaptive Mobile Agent-based Intrusion Detection System
Mohamad Eid,Hassan Artail,Ayman Kayssi,Ali Chehab
International Journal of Network Security , 2008,
Abstract: Intrusion detection system (IDS) has become an essential component of a computer security scheme as the number of security-breaking attempts originating inside organizations is increasing steadily. The idea of filtering the traffic at the ``entrance door'' (by firewalls, for instance) is not completely successful since it does not allow monitoring of local traffic. This paper presents a lightweight and adaptive mobile agent-based intrusion detection system (LAMAIDS) that detects intrusion from outside the network as well as from inside. A main machine, being a typical intrusion detection system residing at a secure location, creates mobile IDS agents and dispatches them into the network. The mobile IDS agents are equipped with lightweight IDS capabilities and decision-making. On each hop, the agents sniff the network traffic and look for abnormal activities using a set of rules supplied by the main machine. Simulation results based on real-world scenarios demonstrate significant improvements in terms of detection rate, network overhead, and adaptability, scalability, and fault tolerance.
ESR Dosimetric Study on Gamma Induced Radicals in DL-Ornithine Hydrochloride  [PDF]
Sayeda Eid
Open Journal of Polymer Chemistry (OJPChem) , 2013, DOI: 10.4236/ojpchem.2013.31005
Abstract:

DL-ornithine hydrochloride rods (3 ×10 mm) were studied to be a radiation sensitive material for EPR dosimetry. The rods have specified EPR signal developed under irradiation and its intensity increases with the increase in absorbed dose. The intensity also affected by the concentration of DL-ornithine in the rods. The prepared rods can be used in the dose range from 0.5 - 50 kGy. The obtained number of free radicals per 100 eV (G value) was found to be 0.3551 ± 0.0333. The hyperfine (hf) coupling constant is 2.325 mT at g-factor 2.033. The rods have the advantage of negligible humidity effects during irradiation. The pre and post- irradiation stability was found to be satisfactory.

Zusammenhang zwischen der Spermienzahl vor und nach Spermienpr paration und der Schwangerschaftsrate nach Intrauteriner Insemination (IUI)
Hammadeh ME,Fischer-Hammadeh C,Molaen S,Rosenbaum P
Journal für Urologie und Urogyn?kologie , 2005,
Abstract: Das Ziel dieser retrospektiven Studie war es, den Vorhersagewert der Spermienzahl vor und nach Spermienpr paration auf die intrauterine Insemination zu untersuchen. Insgesamt 193 Paare unterzogen sich 458 (2,4 ± 1,5) Inseminationen. Die Schwangerschaftsrate vor Spermienpr paration bezüglich der Spermienzahl betrug 14,3 % (14 Schwangerschaften) in der ersten Gruppe (0 19 Mio./ml; n = 47;), 7,2 % (12) in der zweiten Gruppe (20 39 Mio./ml; n = 59) und 12,9 % (27) in der dritten Gruppe ( 40 Mio./ml; n = 87). Es konnte keine statistische Signifikanz bezüglich der Schwangerschaftsrate zwischen den Gruppen festgestellt werden. Die Schwangerschaftsraten nach Spermienpr paration bezogen auf die Spermienzahl betrugen 10,1 % (23 Schwangerschaften) in der ersten Gruppe (0 19 Mio./ml; n = 102), 10,8 % (18) in der zweiten Gruppe (20 39 Mio./ml; n = 58;) und 14,6 % (12) in der dritten Gruppe ( 40 Mio. /ml; n = 32). Hierbei zeigten sich keine signifikanten Unterschiede zwischen Gruppe I und II und zwischen Gruppe II und III. Aber zwischen Gruppe I und III konnte eine solche ermittelt werden (p = 0,034). Es ist festzustellen, da die native Spermienzahl (vor Pr paration) keine Aussage über eine sp tere Schwangerschaft machen kann. Daher ist eine Spermienselektion im Rahmen der IUI notwendig, da die Schwangerschaftsrate mit zunehmender Spermienzahl ansteigt. Die Spermienzahl nach Pr paration kann daher als prognostischer Parameter für die erfolgreiche IUI benutzt werden.
Zusammenhang zwischen Kryokonservierungstechnik und Spermienmorphologie, sowie Chromatinintegrit t von fertilen und subfertilen M nnern
Hammadeh ME,Fischer-Hammadeh C,Rosenbaum P,Schmidt W
Journal für Fertilit?t und Reproduktion , 2002,
Abstract: Einige Autoren haben gezeigt, da die computergesteuerte Einfriermethode die Spermienqualit t besser aufrechterh lt, als die Stickstoffdampf-Methode. Andere wiederum konnten keinen Vorteil finden, zumindest bei menschlichen Spermien. Das Ziel dieser Arbeit war es, zum einen negative Einflüsse der Einfrier-Auftau-Prozedur festzustellen (Kryosch digung), zum anderen herauszufinden, ob es einen Unterschied zwischen der computergesteuerten Einfrier-Auftau-Technik und der Stickstoffdampf-Technik in Hinblick auf Chromatin- und Morphologiever nderungen, sowohl von fertilen als auch von subfertilen M nnern, gibt. Die Studie umfa t 60 Spermaproben, 25 nachweislich fertiler Spender (Kontrollgruppe G2) und 35 Proben von Patienten mit Fertilit tsst rungen (G1), beurteilt nach WHO-Richtlinien (1992). Die Proben wurden mit dem Kryoprotektivum Glycerol (HSPM) 1:1 gemischt und jeweils in Stickstoffdampf und mit einer biologischen Friermaschine (Planer Serie 10) eingefroren. Vor und nach dem Einfrier-Auftau-Vorgang wurden mehrere Ausstriche angefertigt, um die Morphologie (strict criteria) und die Chromatinkondensation mittels Acridin-Orange-F rbung auszuwerten. Der Anteil an kondensiertem Chromatin im nativen Sperma der fertilen Probanden zeigte einen signifikanten Abfall (p 0,001) von 88,14 ± 7,9% auf 80,70 ± 6,6% nach Einfrieren mit dem computergesteuerten Einfrierger t und auf 78,9 ± 7,3 nach Einfrieren mit Stickstoffdampf. Die entsprechenden Werte der subfertilen Probanden zeigten die gleiche Tendenz und fielen ebenso signifikant (p = 0,001) von 72,14 ± 7,91% auf 64,13 ± 9,7% bzw. 62,20 ± 9,6% ab. Die Morphologie der Spermien zeigte die gleich Tendenz: Die prozentualen Anteile der morphologisch normalen Spermien (27,9 ± 6,5%), eingefroren mit computergesteuerten Frierger ten, zeigten in der fertilen Gruppe einen nicht signifikanten Abfall (p = 0,247) auf 23,8 ± 4,80%; nach Einfrieren mit Stickstoffdampf auf 23,42 ± 5,13%. In der subfertilen Gruppe war der Kryoschaden h her als in der Kontrollgruppe, die Werte fielen hier signifikant (p = 0,048) von 15,13 ± 6,5% auf 12,13 ± 6,5% nach Einfrieren mit der biologischen Friermaschine und auf 10,0 ± 4,8% nach Einfrieren mit Stickstoffdampf. Die Einfrier-Auftau-Prozedur führt zu einem negativem Effekt (Sch digung) auf die Spermienmorphologie und die Chromatinstruktur, sowohl bei subfertilen als auch bei fertilen Probanden. Beim Vergleich der beiden Einfrier-Auftau-Techniken zeigt sich ein signifikanter Unterschied bezüglich der Morphologie und dem Anteil an kondensiertem Chromatin bei Anwendung des Acridin-Orange-Testes in
Ischemic Monomelic Neuropathy after a Brachio-Cephalic AVF Creation: A Case Report and Review of Literature  [PDF]
Mohamad Taha
World Journal of Cardiovascular Surgery (WJCS) , 2017, DOI: 10.4236/wjcs.2017.73004
Abstract: Ischemic monomelic neuropathy (IMN) is an under-diagnosed and disabling complication of upper extremity hemodialysis access. The hemodynamic disturbance that occurs during the time of access creation can lead to both neurologic and ischemic complications. These complications are most commonly seen following proximal procedures involving the upper limbs. Diagnosis and treatment are often delayed, and even with early intervention, neurologic dysfunction may be irreversible. IMN can lead to significant long-term disability. Almost all cases of IMN occur with brachial artery-based access, procedures and the vast majority of patients are diabetic and females. I report a case of IMN after left BC AVF operation which was treated successfully by early access ligation, providing a review of the literature.
Investigation of Dyed Film Based on Quinaldine Red Dyed Poly(Vinyl Alcohol) and Poly(Vinyl Butyral) for High Dose Dosimetry Applications  [PDF]
Wafaa B. Beshir, Sayeda Eid
Open Journal of Polymer Chemistry (OJPChem) , 2012, DOI: 10.4236/ojpchem.2012.23015
Abstract: Dyed polymer films, prepared by a simple technique of casting aqueous solutions of poly(vinyl alcohol) PVA or poly(vinyl butyral) PVB containing quinaldine red (QR) on a horizontal glass plate, are useful as routine high-dose dosimeters. These flexible plastic film dosimeters are bleached when exposed to gamma rays. The response of these dosimeters depends on the concentration of QR and the polymer material. The radiation chemical yield (G-value) of both PVA and PVB dyed films was calculated and was found to increase with increasing dye concentration. The effect of relative humidity during irradiation as well as pre- and post-irradiation storage, on the response of the films is examined. These films are not affected by humidity change in the intermediate range of 10% - 50%.
The Impact of Direct Foreign Investment on Unemployment in Jordan  [PDF]
Mohammad Haroun Eid Al Amarat
Modern Economy (ME) , 2016, DOI: 10.4236/me.2016.76078
Abstract: This study aimed at recognizing the size of direct foreign investment in Jordan and its impact on the rate of unemployment in Jordan. It also aimed at recognizing the constraints against the foreign investment. The study concludes that the low levels of these investments are attributed to the lack of regulating legislations that encourage foreign investment in Jordan. The study recommends the development of services and infrastructures; besides, the Jordanian concerned departments should prepare and disseminate the information on investment opportunities in Jordan.
Modeling and performance evaluation of an electromechanical valve actuator for a camless IC engine
Eid Mohamed
International Journal of Energy and Environment , 2012,
Abstract: Valve train control is one of the best strategies for optimizing efficiency and emissions of Internal Combustion (IC) engines. Applications of solenoid valve actuators in (IC) engines can facilitate operations such as variable valve timing and variable valve lifting for improved the engine performance, fuel economy and reduce emission, the electromechanical valve actuator (EMVA) uses solenoid to actuate valve movement independently for the application of (IC) engine. In this work presents the effects of design and operating parameters on the system dynamic performances of the actuator and the proposed an (EMVA) structure by incorporating the hybrid magneto-motive force (MMF) implementation in which the magnetic flux is combined by the coil excitation and permanent magnets. A two-degree-of-freedom lumped parameter model is used to simulate the response of valve actuator system in the opening and closing. The model and control of an electromagnetic valve (EMV) are described. This is done using electromagnetic force to open and close the valve and a controller regulates the motion specifications required. The developments controller is based on a state-space description of the actuator that is derived based on physical principles and parameter identification. Linear-quadratic regulator design (LQR) optimal control is designed with the evaluation reasonable the performance and energy of (EMV) valve are obtained with the design.
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