Beirut, Lebanon

Lebanese University

www.ul.edu.lb
Beirut, Lebanon

The Lebanese University is the only public institution for higher learning in Lebanon. The university has 16 faculties as of 2014 and serves various cultural, religious, and social groups of students and teachers.The independent university enjoys administrative, academic, and financial freedom. Among its educational goals are creating a unique mix of cultures and providing the basic and necessary education to allow students to enter various professions. Wikipedia.

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Dgheim J.A.,Lebanese University
Laser Physics | Year: 2016

A numerical model is developed to study heat and radiation transfers during the interaction between a UV laser beam and silicon nitride. The laser beam has temporal Gaussian or Gate shapes of a wavelength of 247 nm, with pulse duration of 27 ns. The mathematical model is based on the heat equation coupled to Lambert-Beer relationship by taking into account the conduction, convection and radiation phenomena. The resulting equations are schemed by the finite element method. Comparison with the literature shows qualitative and quantitative agreements. The investigated parameters are the temperature, the timing of the melting process and the melting phase thickness. The effects of the laser fluences, ranging from 500 to 16 000 J.m-2, the Gaussian and Gate shapes on the heat transfer, and the melting phenomenon are studied. © 2016 Astro Ltd.


Zaraket H.,Lebanese University
Journal of Physics: Conference Series | Year: 2017

A new energy loss mechanism model is presented. Medium multiple scattering is modified by the interaction with a classical non-abelian background field. It is shown that the obtained gluon radiation spectrum has a symmetric structure in x (the outgoing radiation energy over incident parton energy) and (1 - x) and the appropriate sign. © Published under licence by IOP Publishing Ltd.


Nassar F.,Lebanese University
Russian Journal of Herpetology | Year: 2017

Placentation was investigated in the viviparous lizard Trachylepis vittata in two populations from distinct locations in Lebanon: an isolated coastal population from Tripoli Palm Island — and a continental high altitude population from Mount Sannine. No differences in the formation of extraembryonic membranes were found between the two locations. Histological examination showed a type I chorioallantoic placenta and an omphaloplacenta. Viviparity does not limit the altitudinal distribution of T. vittata and is not accompanied by a highly specialized placental structure. © 2017 Folium Publishing Company.


The International Association of HealthCare Professionals is pleased to welcome Sami Zeineddine, MD, FACOG, Obstetrician and Gynecologist, to their prestigious organization with his upcoming publication in The Leading Physicians of the World. Dr. Sami Zeineddine is a highly trained and qualified OB/GYN with an extensive expertise in all facets of his work. Dr. Zeineddine has been in practice for more than 17 years and is an Obstetrician and Gynecologist for Alegent Creighton Clinic Women’s Health Specialists in Omaha, Nebraska. He is also affiliated with CHI Health Clinic. Dr. Sami Zeineddine attended Lebanese University in Beirut, Lebanon, where he graduated with his Medical Degree. Upon relocating to the United States, Dr. Zeineddine completed his residency in Obstetrics and Gynecology at Creighton Medical Center, followed by an additional residency in Family Practice in the Fort Wayne Medical Education Program. Dr. Zeineddine is certified by the American Board of Obstetrics and Gynecology, and has earned the coveted title of Fellow of the American College of Obstetrics and Gynecology. To keep up to date with the latest advances in his field, Dr. Zeineddine maintains professional memberships with the American Congress of Obstetricians and Gynecologists, the National Medical Association, and the Nebraska Medical Association. He attributes his success to the support of his family and mentors, and when he is not assisting his patients, Dr. Zeineddine enjoys running. Learn more about Dr. Zeineddine by reading his upcoming publication in The Leading Physicians of the World. FindaTopDoc.com is a hub for all things medicine, featuring detailed descriptions of medical professionals across all areas of expertise, and information on thousands of healthcare topics.  Each month, millions of patients use FindaTopDoc to find a doctor nearby and instantly book an appointment online or create a review.  FindaTopDoc.com features each doctor’s full professional biography highlighting their achievements, experience, patient reviews and areas of expertise.  A leading provider of valuable health information that helps empower patient and doctor alike, FindaTopDoc enables readers to live a happier and healthier life.  For more information about FindaTopDoc, visit http://www.findatopdoc.com


Patent
French National Center for Scientific Research and Lebanese University | Date: 2014-10-10

A heterojunction structure of semiconductor material, for a high electron mobility transistor includes a substrate, a buffer layer, arranged on the substrate, of a large bandgap semiconductor material, based on a nitride from column III, where the buffer layer is not intentionally doped with n-type carriers, a barrier layer arranged above the buffer layer, of a large bandgap semiconductor material based on a nitride from column III, where the width of the bandgap of the barrier layer is less than the width of the bandgap of the buffer layer. The heterojunction structure additionally comprises an intentionally doped area, of a material based on a nitride from column III identical to the material of the buffer layer, in a plane parallel to the plane of the substrate and a predefined thickness along a direction orthogonal to the plane of the substrate, where the area is comprised in the buffer layer.


Hamze Y.,Lebanese University
Physics Procedia | Year: 2014

Under line Pathology of Materials; one of the environmental causes of damage effects on concrete is freeze thaw cycles, which deteriorate the concrete exposed to water in cold weather. An example of old concrete is a dam project that was built in Canada, in the early 1909-1913. This project was reconstructed in 1932, 1934 and 1972, and required renovation due to the ice abrasion with the freeze/thaw cycles. Before completing any renovation, it is required to analyze the structural stability and the concrete failures of this dam. An investigation was conducted to determine the quality of the concrete in the Piers and in the Bridge Deck Slab. It was also required to determine the basic materials' properties that constitute this project. This will improve the analysis of its stability [10]. Core samples were examined and used as test samples, for the Alkali-Silica reactivity test samples, as well as the compressive strength test, the Chloride Ion test, and the freeze thaw testing which was performed on two sets of 12 concrete core samples that were taken from different locations in the project. These locations are the representations of the age of the concrete. Thus, the age difference between the samples' two sets is four decades. Testing was performed on prisms cut from cores. ASTM C-666 procedure (A) was applied using an automatic test system [6]. It was suggested that a plan for renovation of this project should be performed after the analysis is undertaken to assess the conditions estimating the remaining life of the concrete in this project [15]. © 2014 Elsevier B.V.


The sustainable access to basic sanitation services is one of the targets of the Millennium Development Goals (MDGs) adopted by the United Nations in 2000. A monitoring and reporting program on progress made on access to improved sanitation services has been pursued by the global community using the universal indicator 'proportion of population using an improved sanitation facility'. However, monitoring and reporting progress using this indicator does not reflect the effective wastewater management and pollution control. This paper presents a methodological approach for quantitative assessment of the effective wastewater management based on non-additive aggregation methodology which accounts for the interactions among indicators. Firstly, a set of indicators are identified and calculation methods are presented. Secondly, the use of 2-order Choquet integral to aggregate indicators into an Effective Wastewater Management index (EWM) is proposed. At the practical level, results of evaluation of the EWM of the Wastewater Collection Systems in Lebanon are then presented and discussed. Finally, the conclusions and further developments are presented. © 2014 Springer International Publishing Switzerland.


Moussallem C.D.,Lebanese University
Journal of Hand Surgery | Year: 2011

Aneurysmal bone cysts rarely affect the carpus. We present a case of aneurysmal bone cyst affecting the lunate. Curettage and bone grafting of the lesion was successful, with no recurrence after 2 years of follow-up. © 2011 American Society for Surgery of the Hand.


Nassar H.,Lebanese University
Journal of Physics: Conference Series | Year: 2012

The CN violet system (B2Σ+ - X 2Σ+) molecular emission spectrum is frequently observed in plasma sources containing hydrocarbons and nitrogen mixture. We have simulated the spectrum of (0,0) and (1,1) bands of this system for different rotational and vibrational temperatures. The influence of the noise to signal ratio has been studied, if the noise to signal ratio is about 10% we found an error of 6% at temperature 3000K and 10% at 6000K.


Nasrallah N.F.,Lebanese University
Physical Review C - Nuclear Physics | Year: 2016

Classic calculations of the magnetic moments μp and μn of the nucleons using the traditional exponential kernel show instability with respect to variations of the Borel mass as well as arbitrariness with respect to the choice of the onset of perturbative QCD. The use of a polynomial kernel, the coefficients of which are determined by the masses of the nucleon resonances stabilizes the calculation and provides much better damping of the unknown contribution of the nucleon continuum. The method is also applied to the evaluation of the coupling gA of proton to the axial current and to the strong part of the neutron-proton mass difference δMnp. All these quantities depend sensitively on the value of the 4-quark condensate (0qqqq0), and the value (0qqqq0)≃1.6(0qq0)2 reproduces the experimental results. © 2016 American Physical Society.

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