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OALib Journal期刊

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2018 ( 16 )

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Impact of Eating Habits and Lifestyle on the Oral Health Status of a Casablanca’s Academic Population  [PDF]
Houriya Mestaghanmi, Ali Labriji, Imane M’Touguy, Fatima Zahra Kehailou, Said Idhammou, Nabil Kobb, Fatema Zahra Mahfoud, Ahmadaye Ibrahim Khalil, Souad El Amrani
Open Access Library Journal (OALib Journal) , 2018, DOI: 10.4236/oalib.1104967
Abstract:
Introduction: Bad eating habits can have serious impact on oral health. Objec-tives: To study the impact of eating habits and dental hygiene practices on the dental status of students. Methods: Cross-sectional study of 400 students aged 17 and more, from the Ben M’Sik Sciences Faculty. A questionnaire on the so-cio-economic level of the parents, the eating habits, the means of hygiene and the oral health status has been filled in anonymously by the respondents. Uni-variate and multivariate descriptive and comparative analyzes were per-formed by the software SPSS 21. Results: The population’s average age is 20 ± 1.59 years old consisted of 55% of boys and 45% of girls. The breakfast is consumed by 67% of students. 39.58% respondents consume sweetened drinks during the meals and 60% at the end of meals and 66% are snacking during the day. 92% of students say they brush their teeth. The brushing time varies between 1 and 3 minutes. 37% of students do never consult a dentist and 63% in case of dental problems. The prevalence of caries is 66%. There is a positive association between the prevalence of tooth decay and certain eating habits (sweet things consumption (p = 0.08), cakes (p = 0.018) and chocolate (p = 0.019) outside of meals). However, this correlation is negative, when the consumption of these foods is done during meals (p > 0.74). On the other hand, there was no correlation between alcohol consumption and presence of caries (p = 0.172), tobacco consumption (p = 0.319), and socioeconomic status parents (p = 0.733). Conclusion: Oral hygiene and regular monitoring by a dentist with healthy eating habits can have a significant impact on the oral status of students.
Personality Traits and Performance: The Mediating Role of Adaptive Behavior in Call Centers  [PDF]
Said Echchakoui
American Journal of Industrial and Business Management (AJIBM) , 2013, DOI: 10.4236/ajibm.2013.31003
Abstract:

Personality traits and adaptive behavior are central issues in research on call center performance. However, the current literature offers little guidance on the relationship between personality traits and adaptive behavior and how they work together to enhance employee performance. This study investigates the mediating role of adaptive behavior between Five-Factor traits and employee performance with customers. Empirical evidence from a Canadian call center supports this proposition for three Five-Factor traits. Managerial implications are discussed.

Dealing with Model Mis-Specification in the Analysis of Morale in Old Age  [PDF]
Said Shahtahmasebi
Open Journal of Social Sciences (JSS) , 2014, DOI: 10.4236/jss.2014.21008
Abstract:

A major challenge for analysis of data from observational and survey studies is dealing with model mis-specification. A common reason for model mis-specification is the violation of the independence assumption. Model mis-specification is frequently due to the inclusion of variables that are correlated with the error terms (serial correlation) or due to variables omitted from the study. The application of standard regression models to such data could lead to over inflated results, i.e. erroneous results, and misleading conclusions. Longitudinally designed studies make substantial improvements and provide an additional handle to control omitted variables. However, even with longitudinal data, model mis-specification could occur because of the nature of observations, i.e. surveys often include objectively as well as subjectively measured variables. Subjective variables are respon

Simulation Topographical Surfaces Geographical and Geological Using Differential Geometry  [PDF]
Mohammedi Ferhat, Bensaada Said
International Journal of Geosciences (IJG) , 2011, DOI: 10.4236/ijg.2011.24070
Abstract: By applying differential geometry to analogue models developed such a model is calculated for the geometrical shape. Dip measurements are critical data for geologists, and in particular for structural studies. They enable quantifying geologic features observed across the surface in order to model the sub-surface. Dip measurements are provided by direct or indirect sources: geological maps, fieldwork data, Digital Elevation Model (DEM). This quantification then allows for comparison of such models to measured field data and supplants the use interferometry Radar describes and compares 3-D deformations. This example supplements and is based on the material found in L.S.S.I.T. Theory as well as some of the experimental results with the new method are delineated.
A Space Unrestricted Multi-Robot Combat Internet of Things System  [PDF]
Omar Said, Mehedi Masud
Advances in Internet of Things (AIT) , 2012, DOI: 10.4236/ait.2012.23007
Abstract: Multi-robot cooperation problem has received increasing attention in the research community and has been extensively studied from different aspects. Space constrain problem is a major issue for building a multi-robot system. This con- strain is a major hindrance for the efficient cooperation among robots in multi-robot applications. In this paper, we demonstrate a novel architecture of a multi-robot system without space restriction. Our architecture is based on the Internet of Things technology. We validated the proposed architecture using a case study considering a multi-robot combat application.
Magnetic resonance spectroscopy in the diagnosis and follow-up of brain tumors  [PDF]
Abdelkhalek Housni, Said Boujraf
Journal of Biomedical Science and Engineering (JBiSE) , 2012, DOI: 10.4236/jbise.2012.512A108
Abstract:

Magnetic Resonance Spectroscopy (MRS) is nowadays considered as a main MRI investigation modality in the clinical routine jointly with conventional anatomical and functional magnetic resonance imag- ing for studying brain tumours. MRS provides complementary information about cellular metabolism. This allows differentiating the brain tumours from abscess, the diagnosis of the tumour type, characterization of brain tumours, as well as local study of the morphological abnormalities observed in conventional MRI. The MRS could be used in the therapeutic follow-up for evaluating the pathological active area of brain, and allows optimizing the guided biopsy as well as to differentiating recurrent tumour from a necrosis.

A Class of Truncated Binomial Lifetime Distributions  [PDF]
Said Hofan Alkarni
Open Journal of Statistics (OJS) , 2013, DOI: 10.4236/ojs.2013.35036
Abstract:

In this paper, a new lifetime class with decreasing failure rate is introduced by compounding truncated binomial distribution with any proper continuous lifetime distribution. The properties of the proposed class are discussed, including a formal proof of its probability density function, distribution function and explicit algebraic formulae for its reliability and failure rate functions. A simple EM-type algorithm for iteratively computing maximum likelihood estimates is presented. The Fisher information matrix is derived in order to obtain the asymptotic covariance matrix. This new class of distributions generalizes several distributions which have been introduced and studied in the literature.

Elaboration and Structural Investigation of Iron (III) Phosphate Glasses  [PDF]
Said Aqdim, Malika Ouchetto
Advances in Materials Physics and Chemistry (AMPC) , 2013, DOI: 10.4236/ampc.2013.38046
Abstract:

The regular melting-quenching method allowed isolating very large vitreous domains within the ternary system Li2O-P2O5-Fe2O3 at 1100. The vitrification and crystallization effects are discussed in terms of phosphorus pentaoxide concentration (mol%). In the course of the present study, we analyzed chemical durability along the glass domain and many sample glasses were isolated. We noticed that our compounds demonstrated very high chemical resistance to attack, even with very highly concentrated mineral acid solutions. This behavior can be assigned to the presence of poorly crystalline phases in these glasses, which tended to increase as the Fe2O3 content increased. This property is a prerequisite for many interesting industrial applications. XRD, IR spectroscopy and SEM micrographs allowed an efficient investigation of the structural changes versus composition within ternary diagrams. The results were found to be consistent with the regular structural changes of phosphate glasses.

Suicide, Mental Illness and Maori People  [PDF]
Said Shahtahmasebi, Bernadette Cassidy
Open Journal of Social Sciences (JSS) , 2014, DOI: 10.4236/jss.2014.28014
Abstract: Globally, authorities and “experts” continually assert that suicide is a major public health concern and it is preventable. However, decades of suicide prevention strategies have seen “more of the same” action plans but no change in the upward suicide trend. Therefore, the current suicide prevention model is less relevant to indigenous and minority populations with a high suicide rate. Current suicide statistics for Maori, New Zealand’s indigenous population are unacceptably high. The Maori suicide rate is about 19 per 100,000 roughly averaging about 104 deaths per year over the last six years. Maori claim that before colonisation suicide was non-existent. There is certainly evidence to support such a claim. e.g., historical suicide data suggested that the number of Maori youth suicide deaths was less than five until the 1970s and 1980s. Maori now have the dubious honour of having the highest rates of mortality and morbidity outcomes, including higher rates of suicide. Neither Maori nor the authorities responded with an action plan when suicide numbers spiked in 1960 and 1967. Subsequently, the number of suicides rose sharply to over one hundred where they stayed. It is plausible that exposure to Western ideals as well as social insensitivity to Maori beliefs and needs may have led to a cultural dealignment during the1960s and 1970s. This cultural shift also may be due to the application of a Western model of suicide prevention based on mental illness. The Western model does not work in preventing suicide and conflicts with indigenous cultures.
Chemical Durability and Structural Proprieties of the Vitreous Part of the System xCaO-(40-x)ZnO-15Na2O-45P2O5  [PDF]
Zineb Chabbou, Said Aqdim
Advances in Materials Physics and Chemistry (AMPC) , 2014, DOI: 10.4236/ampc.2014.410021
Abstract: The influence of CaO on the glass forming characteristics and properties of Na2O-CaO-ZnO-P2O5 glasses has been investigated. According to the studies that we performed on phosphate based glass within system xCaO-(40-x)ZnO-15Na2O-45P2O5 (10 ≤ x ≤ 30; mol%), it was found that the increase of CaO and substitution of ZnO can give a good chemical durability. Both Cristallographies X-ray and IR spectroscopy have confirmed the structure change when the CaO content increases in the glass. This change results in the formation of metaphosphate and/or rings of metaphosphate groups at the expense of pyrophosphate. So it indicates the formation of Ca-O-P bonds in the network glass that replaces hydrated P-O-Na and P-O-P bands. The phosphate chains units can be bonded together in rings forming meta-phosphate groups. These rings likely lead to the formation of agglomerates of crystalline phases, which is the main cause of the increase in the chemical durability of the glasses when the CaO content increases. The latter may lead to wider use of these materials, especially in the biomedical field.
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