German University in Cairo
Cairo, Egypt

The German University in Cairo is a university in New Cairo City, Cairo, Egypt. The language of instruction is English.Presidential decree 27German Chamber of Industry and Commerce , the Federal Ministry of Education and Research, Germany, The State University of Tübingen and The State University of Mannheim. Wikipedia.

Time filter
Source Type

Sigel R.,German University in Cairo
Soft Matter | Year: 2017

An experimental strategy for the detection of fluctuation dynamics at interfaces based on a combination of photon correlation spectroscopy (PCS) with a nulling ellipsometry scheme is investigated theoretically. The intensity description of ellipsometry measurements is generalized to PCS time correlation functions. The nulling ellipsometry procedure is applied for every lag time t of the correlation functions, to extract the dynamics connected to the coherent signal which contains the interface dynamics. The classical ellipsometry parameters Δ and tanΨ are generalized to functions and tan Q(t). A suitable Siegert relation is derived and employed to show that either field correlation functions or intensity correlation functions after baseline subtraction can be used as the starting point for the nulling ellipsometry procedure. © The Royal Society of Chemistry.

Agency: European Commission | Branch: FP7 | Program: MC-ITN | Phase: FP7-PEOPLE-2012-ITN | Award Amount: 3.56M | Year: 2012

Soft nanotechnology is generally considered as a field that will have a major impact on technological developments in near future. However, the fundamental understanding of the wealth of new structures lacks far behind, despite supporting activity from material science. Such an understanding is indispensable for sustainable growth of this important research domain and its applications. A physics-oriented interdisciplinary education is urgently needed to guide young researchers to the point where they can tackle the relevant fundamental questions. SOMATAI is set up to provide just such training by combining two distinct scientific fields: Soft matter science is a well established interdisciplinary field for the bulk investigation of polymers, colloids, and liquid crystals with response amplitude and time to external stimuli as a function of soft matter structure being of special interest. The second highly relevant field is interface science, since nano-structured materials contain a huge area of internal interfaces which have an essential impact on material properties. The application of the soft matter approach to interfaces promises new and deeper understanding of interfacial phenomena. Interfaces of a water phase to a solid, liquid or gaseous second phase are of special interest and a focal point of SOMATAI. Such interfaces are highly relevant to products from European industry (food, cosmetics, paints) and processes (washing, coating, water purification). They have an outstanding importance from a scientific point of view due to specific interactions at such interfaces. This carefully planned teaching and research programme in a network of 10 leading academic partners, 1 large scale companies, 2 SMEs, and 4 top-level associated partners from Germany, Taiwan and the USA will ensure that young researchers are given an excellent training in a pioneering research domain of high scientific and technological relevance, where Europe can take a leading position.

Hamouda Y.A.,German University in Cairo
Renewable and Sustainable Energy Reviews | Year: 2012

Motivated by the rise of the electricity tariffs applied on industrial customer and the frequent electricity cut offs recently experienced in Egypt, this paper assesses the economic feasibility of installing a stand alone wind energy technology by an industrial customer who seeks to reduce his dependency on the national grid. For this purpose, the wind energy potential at the wind regime of Cairo was chosen to be assessed using half an hour wind speed data for a full one-year period (2009). The Weibull parameters of the wind speed distribution function were estimated by employing the maximum likelihood approach. The estimation revealed that Cairo has poor wind resources. Despite the poor resources, the financial analysis has shown that under certain parameters the wind project can prove to be financially viable. Thus harnessing wind energy through stand alone systems can help in meeting the industries electric power needs. © 2012 Elsevier Ltd. All rights reserved.

Zlotos D.P.,German University in Cairo
Current Medicinal Chemistry | Year: 2012

The various physiological actions of the neurohormone melatonin are mediated mainly by two G-protein-coupled MT1 and MT2 receptors. The melatoninergic drugs on the market, ramelteon and agomelatine, as well as the most advanced drug candidates under clinical evaluation, tasimelteon and PD-6735, are high-affinity nonselective MT1 and MT2 agonists. However, exploring the exact physiological role of the MT1 and MT2 melatonin receptors requires subtype selective MT1 and MT2 ligands. This review covers novel melatoninergic agonists and antagonists published since 2010, focusing on high-affinity and subtype selective agents. Additionally, compounds not mentioned in the previous review articles and ligands selective for the MT3 binding site are included. © 2012 Bentham Science Publishers.

Klischewski R.,German University in Cairo
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2010

As transaction costs of web-based interaction in e-government continue to decrease, the actors involved are forced to reconsider their roles and value propositions. This paper builds on previous research on government transformation and introduces three propositions on how new opportunities opened up by emerging web technologies and methods lead to a paradigmatic change of the role of administrations in e-government. The propositions are developed in the areas of information management, creation of service value, and leadership in administration, based on identifying technology-induced challenges ("anomalies") as well as new opportunities leading to new role conceptions in administrations. © 2010 Springer-Verlag Berlin Heidelberg.

Meawad F.,German University in Cairo
2011 24th IEEE-CS Conference on Software Engineering Education and Training, CSEE and T 2011 - Proceedings | Year: 2011

Software engineers are expected to possess a variety of technical, social and personal competencies to be well prepared for real world working environments. At the German University in Cairo (GUC), we were able to guide large groups of students into becoming self managing and self learning communities whose members work together as a team to build large scale software. The students were able to experience many of the challenges in software engineering and develop a variety of related skills in a short period of time. This report describes our detailed experience in reaching such results using agile development practices in a simulated enterprise environment. With an aim to enable educators realise the same success, this report serves as a guide for educators who wish to replicate the process. The resulting successes and the concerns from this unique experience are discussed along with future recommendations. © 2011 IEEE.

The performance of a multicarrier direct sequence code division multiple access (MC-DS-CDMA) system in fading environment has been extensively analysed in the literatures. The analysis that is available in the literatures did not take into account the impact of jamming and channel estimation errors on the performance of the system. In this study, closed-form expressions of the average bit error probability (BEP) of the MC-DS-CDMA system with channel estimation errors in the presence of partial band, broadband and multitone jamming are derived in a Rayleigh fading channel. The analysis shows that the magnitude of the normalised correlation between the actual and the estimated complex fading channel gain, A, greatly affects the performance of the MC-DS-CDMA system. For large signal-to-noise ratio, the average BEP with A = 1 and without multiple access interference (MAI) tends to zero. When A = 1, the BEP of the system exhibits an error floor even without MAI. This error floor increases as the number of users increases. It is also shown that increasing the number of the system subcarriers enhances the system performance against jamming. © The Institution of Engineering and Technology 2009.

Gervet C.,German University in Cairo | Atef M.,German University in Cairo
RAIRO - Operations Research | Year: 2013

Applied research into Renewable Energies raises complex challenges of a technological, economical or political nature. In this paper, we address the techno-economical optimization problem of selecting locations of wind and solar Parks to be built in Egypt, such that the electricity demand is satisfied at minimal costs. Ultimately, our goal is to build a decision support tool that will provide private and governmental investors into renewable energy systems, valuable insights to make informed short and longer term decisions with respect to park creation and placements. Existing approaches have essentially focused on past data to tackle variations of this problem. In this paper, we introduce a novel approach that considers both past and forecast data, and show the impact for accounting for both sets of data and constraints in a two-stage optimization model. We first show that integer linear programming is best suited to solve the past data model compared to Dynamic Programming and Constrained Local Search. We then introduce our two - stage model that accounts for forecast data as well, adding new constraints to the initial model. Our empirical results show that the two - stage model improves solution quality and overall costs, and can be solved effectively to optimality using Integer Linear Programming. © EDP Sciences, ROADEF, SMAI, 2013.

El-Laithy H.M.,Cairo University | Shoukry O.,German University in Cairo | Mahran L.G.,German University in Cairo
European Journal of Pharmaceutics and Biopharmaceutics | Year: 2011

Vinpocetine (Vin) existing oral formulations suffer poor bioavailability (∼7%) since Vin undergoes a marked first-pass effect (∼75%) and its absorption is dissolution rate-limited. In this study, a novel sustained release proniosomal system was designed using sugar esters (SEs) as non-ionic surfactants in which proniosomes were converted to niosomes upon skin water hydration following topical application under occlusive conditions. Different in vitro aspects (encapsulation efficiency, vesicle size and shape, effect of occlusion, in vitro release, skin permeation and stability) were studied leading to an optimized formula that was assessed clinically for transdermal pharmacokinetics and skin irritation. All formulae exhibited high entrapment efficiencies, regardless of the surfactant HLB. Vesicle size analysis showed that all vesicles were in the range from 0.63 μm to 2.52 μm which favored efficient transdermal delivery. The extent of drug permeation through the skin from the optimized formula - containing laurate SE with shorter fatty acid chain length and high HLB - was quite high (91%) after 48 h under occlusive conditions. The extent of absorption of Vin from proniosomes was larger when compared to the oral tablet with a relative bioavailability (Frel) of 206%. Histopathological evaluation revealed only moderate skin irritation when using SEs compared to skin inflammation when using Tween 80. Sugar esters proniosomes may be a promising carrier for vinpocetine, especially due to their simple scaling up and their ability to control drug release. © 2010 Elsevier B.V. All rights reserved.

Mattavelli M.,Ecole Polytechnique Federale de Lausanne | Amer I.,German University in Cairo | Raulet M.,Institute of Electronics and Telecommunications of Rennes
IEEE Signal Processing Magazine | Year: 2010

More than two decades of research in digital video technologies, together with the emergence of successful international standards for digital video compression, have led to a wide variety of digital video products using video compression for professional and consumer applications. Although many of these video compression standards share common and/or similar coding tools, there is currently no explicit way to exploit such commonalities at the level of the specifications nor at the level of implementations. Moreover, the possibility of taking advantage of the benefits of the continuous improvements of coding technology is only possible by replacing an old standard with a new one. This usually results in the replacement of the existing multimedia devices with new ones capable of handling the new deployed standards. Such necessity is not always well accepted by the public and professionals for obvious reasons. © 2010 IEEE.

Loading German University in Cairo collaborators
Loading German University in Cairo collaborators