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Search Results: 1 - 10 of 33 matches for " Hamchi Ilhem "
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Exponential Decay Rate of the Perturbed Energy of the Wave Equation with Zero Order Term  [PDF]
Hamchi Ilhem
Advances in Pure Mathematics (APM) , 2011, DOI: 10.4236/apm.2011.15049
Abstract: In this paper, we consider the wave equation with zero order term. We use the compactness uniqueness argument and some result of I. Lasiecka and D. Tataru in [4] to prove, directly, the exponential decay rate of the perturbed energy.
Boundary stabilization of a coupled system of nondissipative Schrodinger equations
Hamchi Ilhem
Electronic Journal of Differential Equations , 2006,
Abstract: We use the multiplier method and the approach in [1] to study the problem of exponential stabilization of a coupled system of two Schrodinger equations.
Dialectology an Interactional Overlap of Disciplines  [PDF]
Mortad-Serir Ilhem
Open Journal of Modern Linguistics (OJML) , 2013, DOI: 10.4236/ojml.2013.32021
Abstract: Dialectology has long been stereotyped as a limited scope of research since dialectologists long lived with the prejudice of being data collectors who amused their time to wander in rural meadows and converse with old peoples; and if there was any relationship between dialectology with other disciplines it was often viewed as intricate and sometimes controversial through many classificatory approaches. It is a false perception to view dialectology as autonomous discipline that inherits traditional dialect atlases; dialectology transcends the work on grounds to scrutinize the way linguistic variables function in speech. Since speech styles have social meaning that marks speakers’ social and personal identity, dialectology as an illustrious field of research is related to many other disciplines to study the analysis of these markers: such as anthropology, folklore, linguistics, phonology, sociology, psychology, history, sociolinguistics, education and literature. This paper, thus, highlights the relationship of dialectology to other disciplines of language in linguistic studies like sociolinguistics and education.
Efficiency of Tunisian Commercial Banks According to the Intermediation Approach
Ilhem Gargouri
International Journal of Economics and Finance , 2013, DOI: 10.5539/ijef.v5n5p190
Abstract: This work focuses on the performance of the banking sector through the analysis of the efficiency of Tunisian commercial banks according to intermediation approach. To measure the cost inefficiencies in banks in Tunisia, we use a translog specification for single-product cost function. The estimated cost efficiency shows a strong correlation between positive and significant efficiency scores according to the approaches (SFA) and (SFAA). The empirical results show that the efficiency cost, depending on the approach SFAA has evolved mixed between 1993 and 2010. Regarding the estimation of efficiency depending on the size of banks, the results show that banks in small and medium size of our sample show medium cost efficiencies better than those made by banks in large sizes. While on the side of profit estimates show that banks of large and medium sizes are more efficient than banks of smaller sizes. Internal determinants of the productive performance of Tunisian banks show that the preponderance of credit activity in relation to other outputs represents a source of efficiency for banks.
One-dimensional and two-dimensional dynamics of cubic maps
Djellit Ilhem,Kara Amel
Discrete Dynamics in Nature and Society , 2006, DOI: 10.1155/ddns/2006/15840
Abstract: We concentrate on the dynamics of one-dimensional and two-dimensional cubic maps, it describes how complex behaviors can possibly arise as a system parameter changes. This is a large class of diffeomorphisms which provide a good starting point for understanding polynomial diffeomorphisms with constant Jacobian and equivalent to a composition of generalized Hénon maps. Due to the theoretical and practical difficulties involved in the study, computers will presumably play a role in such efforts.
A Specification and Generation System for Interactive Multimedia Documents
Ilhem Labed,Mahmoud Boufaida
Information Technology Journal , 2007,
Abstract: The introduction of interactive multimedia documents gives a real power to the communication field. This kind of documents gives more expressive power to catch user attention by the integration of different media types. Therefore, several research works are focused on the way to manage multimedia documents. We present a system that supports both the specification of constraints among media components and the generation of multimedia presentations. The main characteristic of this system is its facility to be used by not programmer users. The proposed system is mainly based on an object oriented document model and offers, to users, a methodology to specify, then to generate their presentations in a simple way.
Animal Models of Varicella Zoster Virus Infection
Kristen Haberthur,Ilhem Messaoudi
Pathogens , 2013, DOI: 10.3390/pathogens2020364
Abstract: Primary infection with varicella zoster virus (VZV) results in varicella (chickenpox) followed by the establishment of latency in sensory ganglia. Declining T cell immunity due to aging or immune suppressive treatments can lead to VZV reactivation and the development of herpes zoster (HZ, shingles). HZ is often associated with significant morbidity and occasionally mortality in elderly and immune compromised patients. There are currently two FDA-approved vaccines for the prevention of VZV: Varivax ? (for varicella) and Zostavax ? (for HZ). Both vaccines contain the live-attenuated Oka strain of VZV. Although highly immunogenic, a two-dose regimen is required to achieve a 99% seroconversion rate. Zostavax vaccination reduces the incidence of HZ by 51% within a 3-year period, but a significant reduction in vaccine-induced immunity is observed within the first year after vaccination. Developing more efficacious vaccines and therapeutics requires a better understanding of the host response to VZV. These studies have been hampered by the scarcity of animal models that recapitulate all aspects of VZV infections in humans. In this review, we describe different animal models of VZV infection as well as an alternative animal model that leverages the infection of Old World macaques with the highly related simian varicella virus (SVV) and discuss their contributions to our understanding of pathogenesis and immunity during VZV infection.
Alamouti OFDM/OQAM systems with time reversal technique
Ilhem Blel,Ridha Bouallegue
Mathematics , 2015,
Abstract: Orthogonal Frequency Division Multiplexing with Offset Quadrature Amplitude Modulation (OFDM/OQAM) is a multicarrier modulation scheme that can be considered as an alternative to the conventional Orthogonal Frequency Division Multiplexing (OFDM) with Cyclic Prefix (CP) for transmission over multipath fading channels. In this paper, we investigate the combination of the OFDM/OQAM with Alamouti system with Time Reversal (TR) technique. TR can be viewed as a precoding scheme which can be combined with OFDM/OQAM and easily carried out in a Multiple Input Single Output (MISO) context such as Alamouti system. We present the simulation results of the performance of OFDM/OQAM system in SISO case compared with the conventional CP-OFDM system and the performance of the combination Alamouti OFDM/OQAM with TR compared to Alamouti CP-OFDM. The performance is derived by computing the Bit Error Rate (BER) as a function of the transmit signal-to-noise ratio (SNR).
Assessment of the Nutritional Status of 202 Elderly People Living at Home in Sidi-Bel-Abbès (Western Algeria)  [PDF]
Noureddine Menadi, Ghozlane Kelkoul, Ilhem Hassani, Belabbes Merrakchi, Slimane Belbraouet
Food and Nutrition Sciences (FNS) , 2015, DOI: 10.4236/fns.2015.61002
Abstract: Background: Malnutrition is common for elderly representing a major public health problem with many consequences for the health. Objectives: To assess the nutritional status of a population of elderly living at home. Subjects and Methods: The assessment was conducted from a population of elderly living at home who saw their doctor in the office of a public health centre. For each subject, the anthropometric parameters (weight, height, body mass index (BMI)), biochemical (serum albumin) and Mini Nutritional Assessment (MNA) tools have been measured and calculated. Results: 202 mostly female (56.44%) subjects aged 73.59 ± 5.87 years were included in this study. 78% were suffering from chronic diseases, the most frequent of which was diabetes (32%). 7.43% of the diseased population have BMI < 21, 5.94% experienced undernutrition (MNA < 17) and 68.81% are at risk of malnutrition (MNA: 17 - 23.50). According to serum albumin, 8.91% of the sample is considered to be malnourished. Conclusion: The MNA has proven to be a screening tool more sensitive than other tools (BMI and albumin) in the evaluation of nutritional risk.
Politeness Strategies Employed towards Linguistic Taboos in Tlemcen Society  [PDF]
Nadia Ghounane, Ilhem Serir-Mortad, Hanane Rabahi
Open Journal of Modern Linguistics (OJML) , 2017, DOI: 10.4236/ojml.2017.75016
Abstract: The current research paper tends to shed light on the use of politeness strategies to avoid the harmonious power of some taboo topics and expressions. In this sense, the present research work provides an in-depth look on the position of these strategies in Tlemcen culture and language use. To this vein, the focal point of this paper revolves around the polite forms that Tlemcen speakers resort to use them in order to express their respect and request for something or to avoid face threatening act when discussing certain taboo themes. To this end, an investigation of politeness strategies in Tlemcen society was made through the help of a questionnaire and a focus group interview. Thus, the outcomes of this study showed that politeness constitutes an indelible part in Tlemcen culture. Tlemcen speakers employed politeness strategies in both family and society to show respect and protect their faces. The results also revealed that they had re-course to polite forms to euphemise sexual matters that are considered to be the most tabooed subject in Tlemcen culture.
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